PNSN > Webicorders > Archive of Interesting Webicorder records > Mount St. Helens Volcanic Advisory 2004-2005 > Webicorder Archive Page for MSH 2004-2005

September 2004 - 2005 Mt. St. Helens Volcanic Advisory
Webicorders and Spectrographs

Beginning on September 23, 2004 a vigorous swarm of small earthquakes was recorded on stations on Mount St. Helens. The seismicity continued at a rate that caused the USGS and PNSN to jointly issue a Notice of Volcanic Unrest on September 26th. Activity continued to escalate and the Notice of Unrest was raised to a Volcanic Advisory (Alert Level 2) on September 29th, and to Alert Level 3 on October 2, and reduced to Alert Level 2 on October 6. After the initial period of vigorous seismicity, lava was extruded in the crater, and a new dome built up during Oct. - Dec. 2004. During January, dome growth slowed and the new dome spalled off large rockfalls. As of February 12, 2005, dome growth and seismicity continue but at a decreased level. During the 2004-2005 eruption, earthquakes occurred at shallow depths within the crater of Mt. St. Helens at the margin between the dome of hardened lava that was extruded in the 1980s following the catastrophic eruption of May 18, 1980 and the area and the new dome extruded during the 2004-2005 eruption.

Webicorder and spectrogram records for this swarm are shown here. Signals are given in Universal time (UTC), which is 7 hours ahead of PDT. Station SEP is located directly on the dome. Station HSR is at the base of the volcanic cone. LON is at Longmire on the south side of Mt. Rainier, JCW is in northwestern Washington -- Map of stations near Mt. St. Helens ...... Map of stations available on webicorders -- Pages will open in a new window

WEBICORDER RECORDS


........................................... HSR ... LON ... JCW - Current Webicorders
9/22 00:00 UTC SEP ... HSR - Normal Background activity
9/22 12:00 UTC SEP ... HSR  - Normal Background activity
9/23 00:00 UTC SEP ... HSR - About 2 AM, PDT - Beginning of swarm
9/23 12:00 UTC SEP ... HSR ....JUN - Activity continues and intensifies
9/24 00:00 UTC SEP ... HSR ....JUN - "	"
9/24 12:00 UTC SEP ... HSR ....JUN - "	"
9/25 12:00 UTC SEP ... HSR ....JUN - "	"
9/26 00:00 UTC SEP ... HSR ....JUN - "	"
9/26 12:00 UTC SEP ... HSR ....JUN - "	"
9/27 00:00 UTC SEP ... HSR ....JUN ... LON - "     "
9/27 12:00 UTC SEP ... HSR ....JUN ... LON - "     "
9/28 00:00 UTC SEP ... HSR ....JUN ... LON - Activity becomes visible on LON (Mt. Rainier Longmire Station)
9/28 12:00 UTC SEP ... HSR ....JUN ... LON - Activity intensifies further
9/29 00:00 UTC SEP ... HSR ....JUN ... LON - "	"
9/29 12:00 UTC SEP ... HSR ....JUN ... LON ... JCW - Activity becomes visible at JCW, in northwestern Washington
9/30 00:00 UTC SEP ... HSR ....JUN ... LON ... JCW
9/30 12:00 UTC SEP ... HSR ....JUN ... LON ... JCW
10/01 00:00 UTC SEP .. HSR ....JUN ... LON ... JCW
10/01 12:00 UTC SEP .. HSR ....JUN ... LON ... JCW -- Steam explosion to 12,000 feet at 11:57 AM - 12:02 local time, broke or destroyed station SEP
- Seismicity decreases greatly for several hours following steam explosion
10/02 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Seismicity resumes and intensifies further
10/02 12:00 UTC ........... HSR ....JUN ... LON ... JCW - Second steam emission at 12:15 PM
- Followed by harmonic tremor lasting 50 min. recorded as far away as JCW
- Seismicity level declines for about 1 hour, then resumes
10/03 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Harmonic tremor episode at 2:57 AM local time, small steam and ash emission at 10:40 PM
10/03 12:00 UTC ........... HSR ....JUN ... LON ... JCW
10/04 00:00 UTC ........... HSR ....JUN ... LON ... JCW
10/04 12:00 UTC ........... HSR ....JUN ... LON ... JCW - Large scale uplift observed in crater, steam and ash emission at 9:43 AM local time
10/05 00:00 UTC ........... HSR ... JUN ... LON ... JCW - HSR webicorder turned down 20 dB at about 7 PM PDT
- Seismicity amplitudes begin to decline
10/05 12:00 UTC ........... HSR ....JUN ... LON ... JCW - Vigorous ash eruption (to 12,000 feet) at 9:03 AM local time
- Followed by abrupt change to lower frequency, lower amplitude seismicity
10/06 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Continuing low-frequency low-amplitude seimicity
-  Barely visible on LON, not visible on JCW
10/06 12:00 UTC ........... HSR ....JUN ... LON ... JCW Amplitudes of events slowly increase
- Becoming visible on LON, not on JCW
10/07 00:00 UTC ........... HSR ....JUN ... LON ... JCW "
Visible on LON, not on JCW
10/07 12:00 UTC ........... HSR ....JUN ... LON ... JCW 
10/08 00:00 UTC ........... HSR ....JUN ... LON ... JCW
10/08 12:00 UTC ........... HSR ....JUN ... LON ... JCW  - Seismicity increases, but not visible on JCW
10/09 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Seismicity continues at increased level
10/09 12:00 UTC ........... HSR ....JUN ... LON ... JCW - "		"
10/10 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Seismicity declines
10/10 12:00 UTC ........... HSR ....JUN ... LON ... JCW 
10/11 00:00 UTC ........... HSR ....JUN ... LON ... JCW
10/11 12:00 UTC ........... HSR ....JUN ... LON ... JCW 
10/12 00:00 UTC ........... HSR ....JUN ... LON ... JCW
10/12 12:00 UTC ........... HSR ....JUN ... LON ... JCW 
10/13 00:00 UTC ........... HSR ....JUN ... LON ... JCW
10/13 12:00 UTC ........... HSR ....JUN ... LON ... JCW 
10/14 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Seismicity increases 
10/14 12:00 UTC ........... HSR ....JUN ... LON ... JCW - " "
10/15 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Seismicity continues to increase
10/15 12:00 UTC ........... HSR ....JUN ... LON ... JCW - " "
10/16 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Seismicity falls off
10/16 12:00 UTC ........... HSR ....JUN ... LON ... JCW - After Oct. 16, seismicity continued, varying somewhat. 
- Seismicity lower than peak activity in early October, but still far above background level. 
10/17 00:00 UTC ........... HSR ....JUN ... LON ... JCW - Seismicity lower than peak activity in early October, but still far above background level. 
10/17 12:00 UTC ........... HSR ....JUN ... LON ... JCW - " "
10/18 00:00 UTC ........... HSR ....JUN ... LON ... JCW - " "
10/18 12:00 UTC ........... HSR ....JUN ... LON ... JCW  - " "
10/19 00:00 UTC ........... HSR ....JUN ... LON ... JCW - " "
10/19 12:00 UTC ........... HSR ....JUN ... LON ... JCW  - " "
10/20 00:00 UTC ........... HSR ....JUN ... LON - Seismicity lower than peak activity in early October, but still far above background level. 
10/20 12:00 UTC ........... HSR ....JUN ... LON - " "
10/21 00:00 UTC ........... HSR ....JUN ... LON  - " "
10/21 12:00 UTC ........... HSR ....JUN ... LON  - " "
10/22 00:00 UTC ........... HSR ....JUN ... LON  - " "
10/22 12:00 UTC ........... HSR ....JUN ... LON  - " "
10/23 00:00 UTC ........... HSR ....JUN ... LON  - " "
10/23 12:00 UTC ........... HSR ....JUN ... LON  - " "
10/24 00:00 UTC ........... HSR ....JUN ... LON  - " "
10/24 12:00 UTC ........... HSR ....JUN ... LON  - " "
10/25 00:00 UTC ........... HSR ....JUN ... LON  - " "
10/25 12:00 UTC ........... HSR ....JUN ... LON  - etc.
10/26 00:00 UTC ........... HSR ....JUN ... LON 
10/26 12:00 UTC ........... HSR ....JUN ... LON 
10/27 00:00 UTC ........... HSR ....JUN ... LON 
10/27 12:00 UTC ........... HSR ....JUN ... LON 
10/28 00:00 UTC ........... HSR ....JUN ... LON 
10/28 12:00 UTC ........... HSR ....JUN
10/29 00:00 UTC ........... HSR ....JUN
10/29 12:00 UTC ........... HSR ....JUN
10/30 00:00 UTC ........... HSR ....JUN
10/30 12:00 UTC ........... HSR ....JUN
10/31 00:00 UTC ........... HSR ....JUN
10/31 12:00 UTC ........... HSR ....JUN
11/01 00:00 UTC ........... HSR ....JUN
11/01 12:00 UTC ........... HSR ....JUN
11/02 00:00 UTC ........... HSR ....JUN
11/02 12:00 UTC ........... HSR ....JUN
11/03 00:00 UTC ........... HSR ....JUN
11/03 12:00 UTC ........... HSR ....JUN
11/04 00:00 UTC ........... HSR ....JUN
11/04 12:00 UTC ........... HSR ....JUN
11/05 00:00 UTC ........... HSR ... JUN
11/05 12:00 UTC ........... HSR ....JUN
11/06 00:00 UTC ........... HSR ....JUN
11/06 12:00 UTC ........... HSR ....JUN
11/07 00:00 UTC ........... HSR ....JUN
11/07 12:00 UTC ........... HSR ....JUN
11/08 00:00 UTC ........... HSR ....JUN
11/08 12:00 UTC ........... HSR ....JUN
11/09 00:00 UTC ........... HSR ....JUN
11/09 12:00 UTC ........... HSR ....JUN
11/10 00:00 UTC ........... HSR ....JUN
11/10 12:00 UTC ........... HSR ....JUN
11/11 00:00 UTC ........... HSR ....JUN
11/11 12:00 UTC ........... HSR ....JUN
11/12 00:00 UTC ........... HSR ....JUN
11/12 12:00 UTC ........... HSR ....JUN
11/13 00:00 UTC ........... HSR ....JUN
11/13 12:00 UTC ........... HSR ....JUN
11/14 00:00 UTC ........... HSR ....JUN
11/14 12:00 UTC ........... HSR ....JUN
11/15 00:00 UTC ........... HSR ....JUN
11/15 12:00 UTC ........... HSR ....JUN
11/16 00:00 UTC ........... HSR ....JUN
11/16 12:00 UTC ........... HSR ....JUN
11/17 00:00 UTC ........... HSR ....JUN
11/17 12:00 UTC ........... HSR ....JUN
11/18 00:00 UTC ........... HSR ....JUN
11/18 12:00 UTC ........... HSR ....JUN
11/19 00:00 UTC ........... HSR ....JUN
11/19 12:00 UTC ........... HSR ....JUN
11/20 00:00 UTC ........... HSR ....JUN
11/20 12:00 UTC ........... HSR ....JUN
11/21 00:00 UTC ........... HSR ....JUN
11/21 12:00 UTC ........... HSR ....JUN
11/22 00:00 UTC ........... HSR ....JUN
11/22 12:00 UTC ........... HSR ....JUN
11/23 00:00 UTC ........... HSR ....JUN
11/23 12:00 UTC ........... HSR ....JUN
11/24 00:00 UTC ........... HSR ....JUN
11/24 12:00 UTC ........... HSR ....JUN
11/25 00:00 UTC ........... HSR ....JUN
11/25 12:00 UTC ........... HSR ....JUN
11/26 00:00 UTC ........... HSR ....JUN
11/26 12:00 UTC ........... HSR ....JUN
11/27 00:00 UTC ........... HSR ....JUN
11/27 12:00 UTC ........... HSR ....JUN
11/28 00:00 UTC ........... HSR ....JUN
11/28 12:00 UTC ........... HSR ....JUN
11/29 00:00 UTC ........... HSR ....JUN
11/29 12:00 UTC ........... HSR ....JUN
11/30 00:00 UTC ........... HSR ....JUN
11/30 12:00 UTC ........... HSR ....JUN
12/01 00:00 UTC ........... HSR ....JUN
12/01 12:00 UTC ........... HSR ....JUN
12/02 00:00 UTC ........... HSR ....JUN
12/02 12:00 UTC ........... HSR ....JUN
12/03 00:00 UTC ........... HSR ....JUN
12/03 12:00 UTC ........... HSR ....JUN
12/04 00:00 UTC ........... HSR ....JUN
12/04 12:00 UTC ........... HSR ....JUN
12/05 00:00 UTC ........... HSR ... JUN
12/05 12:00 UTC ........... HSR ....JUN
12/06 00:00 UTC ........... HSR ....JUN
12/06 12:00 UTC ........... HSR ....JUN
12/07 00:00 UTC ........... HSR ....JUN
12/07 12:00 UTC ........... HSR ....JUN
12/08 00:00 UTC ........... HSR ....JUN
12/08 12:00 UTC ........... HSR ....JUN
12/09 00:00 UTC ........... HSR ....JUN
12/09 12:00 UTC ........... HSR ....JUN
12/10 00:00 UTC ........... HSR ....JUN
12/10 12:00 UTC ........... HSR ....JUN
12/11 00:00 UTC ........... HSR ....JUN
12/11 12:00 UTC ........... HSR ....JUN
12/12 00:00 UTC ........... HSR ....JUN
12/12 12:00 UTC ........... HSR ....JUN
12/13 00:00 UTC ........... HSR ....JUN
12/13 12:00 UTC ........... HSR ....JUN
12/14 00:00 UTC ........... HSR ....JUN
12/14 12:00 UTC ........... HSR ....JUN
12/15 00:00 UTC ........... HSR ....JUN
12/15 12:00 UTC ........... HSR ....JUN
12/16 00:00 UTC ........... HSR ....JUN
12/16 12:00 UTC ........... HSR ....JUN
12/17 00:00 UTC ........... HSR ....JUN
12/17 12:00 UTC ........... HSR ....JUN
12/18 00:00 UTC ........... HSR ....JUN
12/18 12:00 UTC ........... HSR ....JUN
12/19 00:00 UTC ........... HSR ....JUN
12/19 12:00 UTC ........... HSR ....JUN
12/20 00:00 UTC ........... HSR ....JUN
12/20 12:00 UTC ........... HSR ....JUN
12/21 00:00 UTC ........... HSR ....JUN
12/21 12:00 UTC ........... HSR ....JUN
12/22 00:00 UTC ........... HSR ....JUN
12/22 12:00 UTC ........... HSR ....JUN
12/23 00:00 UTC ........... HSR ....JUN
12/23 12:00 UTC ........... HSR ....JUN
12/24 00:00 UTC ........... HSR ....JUN
12/24 12:00 UTC ........... HSR ....JUN
12/25 00:00 UTC ........... HSR ....JUN
12/25 12:00 UTC ........... HSR ....JUN
12/26 00:00 UTC ........... HSR ....JUN
12/26 12:00 UTC ........... HSR ....JUN
12/27 00:00 UTC ........... HSR ....JUN
12/27 12:00 UTC ........... HSR ....JUN
12/28 00:00 UTC ........... HSR ....JUN
12/28 12:00 UTC ........... HSR ....JUN
12/29 00:00 UTC ........... HSR ....JUN
12/29 12:00 UTC ........... HSR ....JUN
12/30 00:00 UTC ........... HSR ....JUN
12/30 12:00 UTC ........... HSR ....JUN
12/31 00:00 UTC ........... HSR ....JUN
12/31 12:00 UTC ........... HSR ....JUN
 2005 
2005/01/01 00:00 UTC ........... HSR ....JUN
2005/01/01 12:00 UTC ........... HSR ....JUN
2005/01/02 00:00 UTC ........... HSR ....JUN
2005/01/02 12:00 UTC ........... HSR ....JUN
2005/01/03 00:00 UTC ........... HSR ....JUN
2005/01/03 12:00 UTC ........... HSR ....JUN
2005/01/04 00:00 UTC ........... HSR ....JUN
2005/01/04 12:00 UTC ........... HSR ....JUN
2005/01/05 00:00 UTC ........... HSR ... JUN
2005/01/05 12:00 UTC ........... HSR ....JUN
2005/01/06 00:00 UTC ........... HSR ....JUN
2005/01/06 12:00 UTC ........... HSR ....JUN
2005/01/07 00:00 UTC ........... HSR ....JUN
2005/01/07 12:00 UTC ........... HSR ....JUN
2005/01/08 00:00 UTC ........... HSR ....JUN
2005/01/08 12:00 UTC ........... HSR ....JUN
2005/01/09 00:00 UTC ........... HSR ....JUN
2005/01/09 12:00 UTC ........... HSR ....JUN
2005/01/10 00:00 UTC ........... HSR ....JUN
2005/01/10 12:00 UTC ........... HSR ....JUN
2005/01/11 00:00 UTC ........... HSR ....JUN
2005/01/11 12:00 UTC ........... HSR ....JUN
2005/01/12 00:00 UTC ........... HSR ....JUN
2005/01/12 12:00 UTC ........... HSR ....JUN
2005/01/13 00:00 UTC ........... HSR ....JUN
2005/01/13 12:00 UTC ........... HSR ....JUN
2005/01/14 00:00 UTC ........... HSR ....JUN - Dome begins to break up, Flash of light on volcanocam at corresponds to rockfall signal at 04:38 UTC
2005/01/14 12:00 UTC ........... HSR ....JUN
2005/01/15 00:00 UTC ........... HSR ....JUN Dome continues to break up, Flash of light on volcanocam at UTC corresponds to rockfall signal at 07:00 UTC
2005/01/15 12:00 UTC ........... HSR ....JUN
2005/01/16 00:00 UTC ........... HSR ....JUN
2005/01/16 12:00 UTC ........... HSR ....JUN
2005/01/17 00:00 UTC ........... HSR ....JUN
2005/01/17 12:00 UTC ........... HSR ....JUN
2005/01/18 00:00 UTC ........... HSR ....JUN
2005/01/18 12:00 UTC ........... HSR ....JUN
2005/01/19 00:00 UTC ........... HSR ....JUN
2005/01/19 12:00 UTC ........... HSR ....JUN
2005/01/20 00:00 UTC ........... HSR ....JUN
2005/01/20 12:00 UTC ........... HSR ....JUN
2005/01/21 00:00 UTC ........... HSR ....JUN
2005/01/21 12:00 UTC ........... HSR ....JUN
2005/01/22 00:00 UTC ........... HSR ....JUN
2005/01/22 12:00 UTC ........... HSR ....JUN
2005/01/23 00:00 UTC ........... HSR ....JUN
2005/01/23 12:00 UTC ........... HSR ....JUN
2005/01/24 00:00 UTC ........... HSR ....JUN
2005/01/24 12:00 UTC ........... HSR ....JUN
2005/01/25 00:00 UTC ........... HSR ....JUN
2005/01/25 12:00 UTC ........... HSR ....JUN
2005/01/26 00:00 UTC ........... HSR ....JUN
2005/01/26 12:00 UTC ........... HSR ....JUN
2005/01/27 00:00 UTC ........... HSR ....JUN
2005/01/27 12:00 UTC ........... HSR ....JUN
2005/01/28 00:00 UTC ........... HSR ....JUN
2005/01/28 12:00 UTC ........... HSR ....JUN
2005/01/29 00:00 UTC ........... HSR ....JUN
2005/01/29 12:00 UTC ........... HSR ....JUN
2005/01/30 00:00 UTC ........... HSR ....JUN
2005/01/30 12:00 UTC ........... HSR ....JUN
2005/01/31 00:00 UTC ........... HSR ....JUN
2005/01/31 12:00 UTC ........... HSR ....JUN
2005/02/01 00:00 UTC ........... HSR ....JUN
2005/02/01 12:00 UTC ........... HSR ....JUN
2005/02/02 00:00 UTC ........... HSR ....JUN
2005/02/02 12:00 UTC ........... HSR ....JUN
2005/02/03 00:00 UTC ........... HSR ....JUN
2005/02/03 12:00 UTC ........... HSR ....JUN
2005/02/04 00:00 UTC ........... HSR ....JUN
2005/02/04 12:00 UTC ........... HSR ....JUN
2005/02/05 00:00 UTC ........... HSR ... JUN
2005/02/05 12:00 UTC ........... HSR ....JUN
2005/02/06 00:00 UTC ........... HSR ....JUN
2005/02/06 12:00 UTC ........... HSR ....JUN
2005/02/07 00:00 UTC ........... HSR ....JUN Flash of light at 09:11 UTC on volcanocam corresponds to rockfall signal at 09:11 UTC
2005/02/07 12:00 UTC ........... HSR ....JUN
2005/02/08 00:00 UTC ........... HSR ....JUN
2005/02/08 12:00 UTC ........... HSR ....JUN
2005/02/09 00:00 UTC ........... HSR ....JUN
2005/02/09 12:00 UTC ........... HSR ....JUN
2005/02/10 00:00 UTC ........... HSR ....JUN
2005/02/10 12:00 UTC ........... HSR ....JUN
2005/02/11 00:00 UTC ........... HSR ....JUN
2005/02/11 12:00 UTC ........... HSR ....JUN
2005/02/12 00:00 UTC ........... HSR ....JUN
2005/02/12 12:00 UTC ........... HSR ....JUN
2005/02/13 00:00 UTC ........... HSR ....JUN
2005/02/13 12:00 UTC ........... HSR ....JUN
2005/02/14 00:00 UTC ........... HSR ....JUN
2005/02/14 12:00 UTC ........... HSR ....JUN
2005/02/15 00:00 UTC ........... HSR ....JUN
2005/02/15 12:00 UTC ........... HSR ....JUN
2005/02/16 00:00 UTC ........... HSR ....JUN
2005/02/16 12:00 UTC ........... HSR ....JUN
2005/02/17 00:00 UTC ........... HSR ....JUN
2005/02/17 12:00 UTC ........... HSR ....JUN
2005/02/18 00:00 UTC ........... HSR ....JUN
2005/02/18 12:00 UTC ........... HSR ....JUN
2005/02/19 00:00 UTC ........... HSR ....JUN
2005/02/19 12:00 UTC ........... HSR ....JUN
2005/02/20 00:00 UTC ........... HSR ....JUN
2005/02/20 12:00 UTC ........... HSR ....JUN
2005/02/21 00:00 UTC ........... HSR ....JUN
2005/02/21 12:00 UTC ........... HSR ....JUN
2005/02/22 00:00 UTC ........... HSR ....JUN
Flash of light on volcanocam at 11:2005/06 UTC corresponds to rockfall signal at 07:00 UTC
2005/02/22 12:00 UTC ........... HSR ....JUN
2005/02/23 00:00 UTC ........... HSR ....JUN
2005/02/23 12:00 UTC ........... HSR ....JUN
2005/02/24 00:00 UTC ........... HSR ....JUN
2005/02/24 12:00 UTC ........... HSR ....JUN
2005/02/25 00:00 UTC ........... HSR ....JUN
2005/02/25 12:00 UTC ........... HSR ....JUN
2005/02/26 00:00 UTC ........... HSR ....JUN
2005/02/26 12:00 UTC ........... HSR ....JUN
2005/02/27 00:00 UTC ........... HSR ....JUN
2005/02/27 12:00 UTC ........... HSR ....JUN
2005/02/28 00:00 UTC ........... HSR ....JUN
2005/02/28 12:00 UTC ........... HSR ....JUN
2005/03/01 00:00 UTC ........... HSR ....JUN
2005/03/01 12:00 UTC ........... HSR ....JUN
2005/03/02 00:00 UTC ........... HSR ....JUN
2005/03/02 12:00 UTC ........... HSR ....JUN
2005/03/03 00:00 UTC ........... HSR ....JUN
2005/03/03 12:00 UTC ........... HSR ....JUN
2005/03/04 00:00 UTC ........... HSR ....JUN
2005/03/04 12:00 UTC ........... HSR ....JUN
2005/03/05 00:00 UTC ........... HSR ... JUN
2005/03/05 12:00 UTC ........... HSR ....JUN
2005/03/06 00:00 UTC ........... HSR ....JUN
2005/03/06 12:00 UTC ........... HSR ....JUN
2005/03/07 00:00 UTC ........... HSR ....JUN
2005/03/07 12:00 UTC ........... HSR ....JUN
2005/03/08 00:00 UTC ........... HSR ....JUN
2005/03/08 12:00 UTC ........... HSR ....JUN
2005/03/09 00:00 UTC ........... HSR ....JUN Ash Eruption sent plume to 36,000 feet elevation at 5:25 PM PST March 8 (01:25 UTC March 9)
2005/03/09 12:00 UTC ........... HSR ....JUN
2005/03/10 00:00 UTC ........... HSR ....JUN
2005/03/10 12:00 UTC ........... HSR ....JUN
2005/03/11 00:00 UTC ........... HSR ....JUN
2005/03/11 12:00 UTC ........... HSR ....JUN
2005/03/12 00:00 UTC ........... HSR ....JUN
2005/03/12 12:00 UTC ........... HSR ....JUN
2005/03/13 00:00 UTC ........... HSR ....JUN
2005/03/13 12:00 UTC ........... HSR ....JUN
2005/03/14 00:00 UTC ........... HSR ....JUN - 
2005/03/14 12:00 UTC ........... HSR ....JUN
2005/03/15 00:00 UTC ........... HSR ....JUN
2005/03/15 12:00 UTC ........... HSR ....JUN - at about 1 PM PST,  gain reduced at YEL by a factor of 2
2005/03/16 00:00 UTC ........... HSR ....JUN
2005/03/16 12:00 UTC ........... HSR ....JUN
2005/03/17 00:00 UTC ........... HSR ....JUN
2005/03/17 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/18 00:00 UTC ........... HSR ....JUN - Missing webicorders 
2005/03/18 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/19 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/19 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/20 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/20 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/21 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/21 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/22 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/22 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/23 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/23 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/24 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/24 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/25 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/25 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/26 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/26 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/27 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/27 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/28 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/03/28 12:00 UTC ........... HSR ....JUN 
2005/03/29 00:00 UTC ........... HSR ....JUN
2005/03/29 12:00 UTC ........... HSR ....JUN
2005/03/30 00:00 UTC ........... HSR ....JUN
2005/03/30 12:00 UTC ........... HSR ....JUN
2005/03/31 00:00 UTC ........... HSR ....JUN
2005/03/31 12:00 UTC ........... HSR ....JUN
2005/04/01 00:00 UTC ........... HSR ....JUN
2005/04/01 12:00 UTC ........... HSR ....JUN
2005/04/02 00:00 UTC ........... HSR ....JUN
2005/04/02 12:00 UTC ........... HSR ....JUN
2005/04/03 00:00 UTC ........... HSR ....JUN
2005/04/03 12:00 UTC ........... HSR ....JUN
2005/04/04 00:00 UTC ........... HSR ....JUN
2005/04/04 12:00 UTC ........... HSR ....JUN
2005/04/05 00:00 UTC ........... HSR ... JUN
2005/04/05 12:00 UTC ........... HSR ....JUN
2005/04/06 00:00 UTC ........... HSR ....JUN
2005/04/06 12:00 UTC ........... HSR ....JUN
2005/04/07 00:00 UTC ........... HSR ....JUN
2005/04/07 12:00 UTC ........... HSR ....JUN
2005/04/08 00:00 UTC ........... HSR ....JUN
2005/04/08 12:00 UTC ........... HSR ....JUN
2005/04/09 00:00 UTC ........... HSR ....JUN
2005/04/09 12:00 UTC ........... HSR ....JUN
2005/04/10 00:00 UTC ........... HSR ....JUN
2005/04/10 12:00 UTC ........... HSR ....JUN
2005/04/11 00:00 UTC ........... HSR ....JUN
2005/04/11 12:00 UTC ........... HSR ....JUN
2005/04/12 00:00 UTC ........... HSR ....JUN
2005/04/12 12:00 UTC ........... HSR ....JUN
2005/04/13 00:00 UTC ........... HSR ....JUN
2005/04/13 12:00 UTC ........... HSR ....JUN
2005/04/14 00:00 UTC ........... HSR ....JUN 
2005/04/14 12:00 UTC ........... HSR ....JUN
2005/04/15 00:00 UTC ........... HSR ....JUN
2005/04/15 12:00 UTC ........... HSR ....JUN
2005/04/16 00:00 UTC ........... HSR ....JUN
2005/04/16 12:00 UTC ........... HSR ....JUN
2005/04/17 00:00 UTC ........... HSR ....JUN
2005/04/17 12:00 UTC ........... HSR ....JUN
2005/04/18 00:00 UTC ........... HSR ....JUN
2005/04/18 12:00 UTC ........... HSR ....JUN
2005/04/19 00:00 UTC ........... HSR ....JUN
2005/04/19 12:00 UTC ........... HSR ....JUN
2005/04/20 00:00 UTC ........... HSR ....JUN
2005/04/20 12:00 UTC ........... HSR ....JUN
2005/04/21 00:00 UTC ........... HSR ....JUN
2005/04/21 12:00 UTC ........... HSR ....JUN
2005/04/22 00:00 UTC ........... HSR ....JUN
2005/04/22 12:00 UTC ........... HSR ....JUN
2005/04/23 00:00 UTC ........... HSR ....JUN
2005/04/23 12:00 UTC ........... HSR ....JUN
2005/04/24 00:00 UTC ........... HSR ....JUN
2005/04/24 12:00 UTC ........... HSR ....JUN
2005/04/25 00:00 UTC ........... HSR ....JUN
2005/04/25 12:00 UTC ........... HSR ....JUN
2005/04/26 00:00 UTC ........... HSR ....JUN
2005/04/26 12:00 UTC ........... HSR ....JUN
2005/04/27 00:00 UTC ........... HSR ....JUN
2005/04/27 12:00 UTC ........... HSR ....JUN
2005/04/28 00:00 UTC ........... HSR ....JUN
2005/04/28 12:00 UTC ........... HSR ....JUN
2005/04/29 00:00 UTC ........... HSR ....JUN
2005/04/29 12:00 UTC ........... HSR ....JUN
2005/04/30 00:00 UTC ........... HSR ....JUN
2005/04/30 12:00 UTC ........... HSR ....JUN
2005/05/01 00:00 UTC ........... HSR ....JUN
2005/05/01 12:00 UTC ........... HSR ....JUN
2005/05/02 00:00 UTC ........... HSR ....JUN
2005/05/02 12:00 UTC ........... HSR ....JUN
2005/05/03 00:00 UTC ........... HSR ....JUN
2005/05/03 12:00 UTC ........... HSR ....JUN
2005/05/04 00:00 UTC ........... HSR ....JUN
2005/05/04 12:00 UTC ........... HSR ....JUN
2005/05/05 00:00 UTC ........... HSR ... JUN
2005/05/05 12:00 UTC ........... HSR ....JUN
2005/05/06 00:00 UTC ........... HSR ....JUN
2005/05/06 12:00 UTC ........... HSR ....JUN
2005/05/07 00:00 UTC ........... HSR ....JUN
2005/05/07 12:00 UTC ........... HSR ....JUN
2005/05/08 00:00 UTC ........... HSR ....JUN
2005/05/08 12:00 UTC ........... HSR ....JUN
2005/05/09 00:00 UTC ........... HSR ....JUN 
2005/05/09 12:00 UTC ........... HSR ....JUN
2005/05/10 00:00 UTC ........... HSR ....JUN
2005/05/10 12:00 UTC ........... HSR ....JUN
2005/05/11 00:00 UTC ........... HSR ....JUN
2005/05/11 12:00 UTC ........... HSR ....JUN
2005/05/12 00:00 UTC ........... HSR ....JUN
2005/05/12 12:00 UTC ........... HSR ....JUN
2005/05/13 00:00 UTC ........... HSR ....JUN
2005/05/13 12:00 UTC ........... HSR ....JUN
2005/05/14 00:00 UTC ........... HSR ....JUN - 
2005/05/14 12:00 UTC ........... HSR ....JUN
2005/05/15 00:00 UTC ........... HSR ....JUN
2005/05/15 12:00 UTC ........... HSR ....JUN
2005/05/16 00:00 UTC ........... HSR ....JUN
2005/05/16 12:00 UTC ........... HSR ....JUN
2005/05/17 00:00 UTC ........... HSR ....JUN
2005/05/17 12:00 UTC ........... HSR ....JUN
2005/05/18 00:00 UTC ........... HSR ....JUN
2005/05/18 12:00 UTC ........... HSR ....JUN
2005/05/19 00:00 UTC ........... HSR ....JUN
2005/05/19 12:00 UTC ........... HSR ....JUN
2005/05/20 00:00 UTC ........... HSR ....JUN
2005/05/20 12:00 UTC ........... HSR ....JUN
2005/05/21 00:00 UTC ........... HSR ....JUN
2005/05/21 12:00 UTC ........... HSR ....JUN
2005/05/22 00:00 UTC ........... HSR ....JUN
2005/05/22 12:00 UTC ........... HSR ....JUN
2005/05/23 00:00 UTC ........... HSR ....JUN
2005/05/23 12:00 UTC ........... HSR ....JUN
2005/05/24 00:00 UTC ........... HSR ....JUN
2005/05/24 12:00 UTC ........... HSR ....JUN
2005/05/25 00:00 UTC ........... HSR ....JUN
2005/05/25 12:00 UTC ........... HSR ....JUN
2005/05/26 00:00 UTC ........... HSR ....JUN
2005/05/26 12:00 UTC ........... HSR ....JUN
2005/05/27 00:00 UTC ........... HSR ....JUN 
2005/05/27 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/05/28 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/05/28 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/05/29 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/05/29 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/05/30 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/05/30 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/05/31 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/05/31 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/06/01 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/06/01 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/06/02 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/06/02 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/06/03 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/06/03 12:00 UTC ........... HSR ....JUN - Missing webicorders
2005/06/04 00:00 UTC ........... HSR ....JUN - Missing webicorders
2005/06/04 12:00 UTC ........... HSR ....JUN 
2005/06/05 00:00 UTC ........... HSR ... JUN 
2005/06/05 12:00 UTC ........... HSR ....JUN 
2005/06/06 00:00 UTC ........... HSR ....JUN
2005/06/06 12:00 UTC ........... HSR ....JUN
2005/06/07 00:00 UTC ........... HSR ....JUN
2005/06/07 12:00 UTC ........... HSR ....JUN
2005/06/08 00:00 UTC ........... HSR ....JUN
2005/06/08 12:00 UTC ........... HSR ....JUN
2005/06/09 00:00 UTC ........... HSR ....JUN 
2005/06/09 12:00 UTC ........... HSR ....JUN
2005/06/10 00:00 UTC ........... HSR ....JUN
2005/06/10 12:00 UTC ........... HSR ....JUN
2005/06/11 00:00 UTC ........... HSR ....JUN
2005/06/11 12:00 UTC ........... HSR ....JUN
2005/06/12 00:00 UTC ........... HSR ....JUN
2005/06/12 12:00 UTC ........... HSR ....JUN
2005/06/13 00:00 UTC ........... HSR ....JUN
2005/06/13 12:00 UTC ........... HSR ....JUN
2005/06/14 00:00 UTC ........... HSR ....JUN 
2005/06/14 12:00 UTC ........... HSR ....JUN
2005/06/15 00:00 UTC ........... HSR ....JUN
2005/06/15 12:00 UTC ........... HSR ....JUN
2005/06/16 00:00 UTC ........... HSR ....JUN
2005/06/16 12:00 UTC ........... HSR ....JUN
2005/06/17 00:00 UTC ........... HSR ....JUN
2005/06/17 12:00 UTC ........... HSR ....JUN
2005/06/18 00:00 UTC ........... HSR ....JUN
2005/06/18 12:00 UTC ........... HSR ....JUN
2005/06/19 00:00 UTC ........... HSR ....JUN
2005/06/19 12:00 UTC ........... HSR ....JUN
2005/06/20 00:00 UTC ........... HSR ....JUN
2005/06/20 12:00 UTC ........... HSR ....JUN
2005/06/21 00:00 UTC ........... HSR ....JUN
2005/06/21 12:00 UTC ........... HSR ....JUN
2005/06/22 00:00 UTC ........... HSR ....JUN
2005/06/22 12:00 UTC ........... HSR ....JUN
2005/06/23 00:00 UTC ........... HSR ....JUN
2005/06/23 12:00 UTC ........... HSR ....JUN
2005/06/24 00:00 UTC ........... HSR ....JUN
2005/06/24 12:00 UTC ........... HSR ....JUN
2005/06/25 00:00 UTC ........... HSR ....JUN
2005/06/25 12:00 UTC ........... HSR ....JUN
2005/06/26 00:00 UTC ........... HSR ....JUN
2005/06/26 12:00 UTC ........... HSR ....JUN
2005/06/27 00:00 UTC ........... HSR ....JUN
2005/06/27 12:00 UTC ........... HSR ....JUN
2005/06/28 00:00 UTC ........... HSR ....JUN
2005/06/28 12:00 UTC ........... HSR ....JUN
2005/06/29 00:00 UTC ........... HSR ....JUN
2005/06/29 12:00 UTC ........... HSR ....JUN
2005/06/30 00:00 UTC ........... HSR ....JUN
2005/06/30 12:00 UTC ........... HSR ....JUN
2005/07/01 00:00 UTC ........... HSR ....JUN
2005/07/01 12:00 UTC ........... HSR ....JUN
2005/07/02 00:00 UTC ........... HSR ....JUN
2005/07/02 12:00 UTC ........... HSR ....JUN
2005/07/03 00:00 UTC ........... HSR ....JUN
2005/07/03 12:00 UTC ........... HSR ....JUN
2005/07/04 00:00 UTC ........... HSR ....JUN
2005/07/04 12:00 UTC ........... HSR ....JUN
2005/07/05 00:00 UTC ........... HSR ... JUN
2005/07/05 12:00 UTC ........... HSR ....JUN
2005/07/06 00:00 UTC ........... HSR ....JUN
2005/07/06 12:00 UTC ........... HSR ....JUN
2005/07/07 00:00 UTC ........... HSR ....JUN
2005/07/07 12:00 UTC ........... HSR ....JUN
2005/07/08 00:00 UTC ........... HSR ....JUN
2005/07/08 12:00 UTC ........... HSR ....JUN
2005/07/09 00:00 UTC ........... HSR ....JUN 
2005/07/09 12:00 UTC ........... HSR ....JUN
2005/07/10 00:00 UTC ........... HSR ....JUN
2005/07/10 12:00 UTC ........... HSR ....JUN
2005/07/11 00:00 UTC ........... HSR ....JUN
2005/07/11 12:00 UTC ........... HSR ....JUN
2005/07/12 00:00 UTC ........... HSR ....JUN
2005/07/12 12:00 UTC ........... HSR ....JUN
2005/07/13 00:00 UTC ........... HSR ....JUN
2005/07/13 12:00 UTC ........... HSR ....JUN
2005/07/14 00:00 UTC ........... HSR ....JUN 
2005/07/14 12:00 UTC ........... HSR ....JUN
2005/07/15 00:00 UTC ........... HSR ....JUN
2005/07/15 12:00 UTC ........... HSR ....JUN
2005/07/16 00:00 UTC ........... HSR ....JUN
2005/07/16 12:00 UTC ........... HSR ....JUN
2005/07/17 00:00 UTC ........... HSR ....JUN
2005/07/17 12:00 UTC ........... HSR ....JUN
2005/07/18 00:00 UTC ........... HSR ....JUN
2005/07/18 12:00 UTC ........... HSR ....JUN
2005/07/19 00:00 UTC ........... HSR ....JUN
2005/07/19 12:00 UTC ........... HSR ....JUN
2005/07/20 00:00 UTC ........... HSR ....JUN
2005/07/20 12:00 UTC ........... HSR ....JUN
2005/07/21 00:00 UTC ........... HSR ....JUN
2005/07/21 12:00 UTC ........... HSR ....JUN
2005/07/22 00:00 UTC ........... HSR ....JUN
2005/07/22 12:00 UTC ........... HSR ....JUN
2005/07/23 00:00 UTC ........... HSR ....JUN
2005/07/23 12:00 UTC ........... HSR ....JUN
2005/07/24 00:00 UTC ........... HSR ....JUN
2005/07/24 12:00 UTC ........... HSR ....JUN
2005/07/25 00:00 UTC ........... HSR ....JUN
2005/07/25 12:00 UTC ........... HSR ....JUN
2005/07/26 00:00 UTC ........... HSR ....JUN
2005/07/26 12:00 UTC ........... HSR ....JUN
2005/07/27 00:00 UTC ........... HSR ....JUN 
2005/07/27 12:00 UTC ........... HSR ....JUN 
2005/07/28 00:00 UTC ........... HSR ....JUN 
2005/07/28 12:00 UTC ........... HSR ....JUN 
2005/07/29 00:00 UTC ........... HSR ....JUN 
2005/07/29 12:00 UTC ........... HSR ....JUN 
2005/07/30 00:00 UTC ........... HSR ....JUN 
2005/07/30 12:00 UTC ........... HSR ....JUN 
2005/07/31 00:00 UTC ........... HSR ....JUN 
2005/07/31 12:00 UTC ........... HSR ....JUN 
2005/08/27 12:00 UTC ........... HSR ....JUN 
2005/08/28 00:00 UTC ........... HSR ....JUN 
2005/08/28 12:00 UTC ........... HSR ....JUN 
2005/08/29 00:00 UTC ........... HSR ....JUN 
2005/08/29 12:00 UTC ........... HSR ....JUN 
2005/08/30 00:00 UTC ........... HSR ....JUN 
2005/08/30 12:00 UTC ........... HSR ....JUN 
2005/08/31 00:00 UTC ........... HSR ....JUN 
2005/08/31 12:00 UTC ........... HSR ....JUN 
2005/09/01 00:00 UTC ........... HSR ....JUN
2005/09/01 12:00 UTC ........... HSR ....JUN
2005/09/02 00:00 UTC ........... HSR ....JUN
2005/09/02 12:00 UTC ........... HSR ....JUN
2005/09/03 00:00 UTC ........... HSR ....JUN
2005/09/03 12:00 UTC ........... HSR ....JUN
2005/09/04 00:00 UTC ........... HSR ....JUN
2005/09/04 12:00 UTC ........... HSR ....JUN
2005/09/05 00:00 UTC ........... HSR ... JUN
2005/09/05 12:00 UTC ........... HSR ....JUN
2005/09/06 00:00 UTC ........... HSR ....JUN
2005/09/06 12:00 UTC ........... HSR ....JUN
2005/09/07 00:00 UTC ........... HSR ....JUN
2005/09/07 12:00 UTC ........... HSR ....JUN
2005/09/08 00:00 UTC ........... HSR ....JUN
2005/09/08 12:00 UTC ........... HSR ....JUN
2005/09/09 00:00 UTC ........... HSR ....JUN 
2005/09/09 12:00 UTC ........... HSR ....JUN
2005/09/10 00:00 UTC ........... HSR ....JUN
2005/09/10 12:00 UTC ........... HSR ....JUN
2005/09/11 00:00 UTC ........... HSR ....JUN
2005/09/11 12:00 UTC ........... HSR ....JUN
2005/09/12 00:00 UTC ........... HSR ....JUN
2005/09/12 12:00 UTC ........... HSR ....JUN
2005/09/13 00:00 UTC ........... HSR ....JUN
2005/09/13 12:00 UTC ........... HSR ....JUN
2005/09/14 00:00 UTC ........... HSR ....JUN 
2005/09/14 12:00 UTC ........... HSR ....JUN
2005/09/15 00:00 UTC ........... HSR ....JUN
2005/09/15 12:00 UTC ........... HSR ....JUN
2005/09/16 00:00 UTC ........... HSR ....JUN
2005/09/16 12:00 UTC ........... HSR ....JUN
2005/09/17 00:00 UTC ........... HSR ....JUN
2005/09/17 12:00 UTC ........... HSR ....JUN
2005/09/18 00:00 UTC ........... HSR ....JUN
2005/09/18 12:00 UTC ........... HSR ....JUN
2005/09/19 00:00 UTC ........... HSR ....JUN
2005/09/19 12:00 UTC ........... HSR ....JUN
2005/09/20 00:00 UTC ........... HSR ....JUN
2005/09/20 12:00 UTC ........... HSR ....JUN
2005/09/21 00:00 UTC ........... HSR ....JUN
2005/09/21 12:00 UTC ........... HSR ....JUN
2005/09/22 00:00 UTC ........... HSR ....JUN
2005/09/22 12:00 UTC ........... HSR ....JUN
2005/09/23 00:00 UTC ........... HSR ....JUN
2005/09/23 12:00 UTC ........... HSR ....JUN
2005/09/24 00:00 UTC ........... HSR ....JUN
2005/09/24 12:00 UTC ........... HSR ....JUN
2005/09/25 00:00 UTC ........... HSR ....JUN
2005/09/25 12:00 UTC ........... HSR ....JUN
2005/09/26 00:00 UTC ........... HSR ....JUN
2005/09/26 12:00 UTC ........... HSR ....JUN
2005/09/27 00:00 UTC ........... HSR ....JUN 
2005/09/27 12:00 UTC ........... HSR ....JUN 
2005/09/28 00:00 UTC ........... HSR ....JUN 
2005/09/28 12:00 UTC ........... HSR ....JUN 
2005/11/03 12:00 UTC ........... HSR ....JUN
2005/11/04 00:00 UTC ........... HSR ....JUN
2005/11/04 12:00 UTC ........... HSR ....JUN
2005/11/05 00:00 UTC ........... HSR ... JUN
2005/11/05 12:00 UTC ........... HSR ....JUN
2005/11/06 00:00 UTC ........... HSR ....JUN
2005/11/06 12:00 UTC ........... HSR ....JUN
2005/11/07 00:00 UTC ........... HSR ....JUN
2005/11/07 12:00 UTC ........... HSR ....JUN
2005/11/08 00:00 UTC ........... HSR ....JUN
2005/11/08 12:00 UTC ........... HSR ....JUN
2005/11/09 00:00 UTC ........... HSR ....JUN 
2005/11/09 12:00 UTC ........... HSR ....JUN
2005/11/10 00:00 UTC ........... HSR ....JUN
2005/11/10 12:00 UTC ........... HSR ....JUN
2005/11/11 00:00 UTC ........... HSR ....JUN
2005/11/11 12:00 UTC ........... HSR ....JUN
2005/11/12 00:00 UTC ........... HSR ....JUN
2005/11/12 12:00 UTC ........... HSR ....JUN
2005/11/13 00:00 UTC ........... HSR ....JUN
2005/11/13 12:00 UTC ........... HSR ....JUN
2005/11/14 00:00 UTC ........... HSR ....JUN 
2005/11/14 12:00 UTC ........... HSR ....JUN
2005/11/15 00:00 UTC ........... HSR ....JUN
2005/11/15 12:00 UTC ........... HSR ....JUN
2005/11/16 00:00 UTC ........... HSR ....JUN
2005/11/16 12:00 UTC ........... HSR ....JUN
2005/11/17 00:00 UTC ........... HSR ....JUN
2005/11/17 12:00 UTC ........... HSR ....JUN
2005/11/18 00:00 UTC ........... HSR ....JUN
2005/11/18 12:00 UTC ........... HSR ....JUN
2005/11/19 00:00 UTC ........... HSR ....JUN
2005/11/19 12:00 UTC ........... HSR ....JUN
2005/11/20 00:00 UTC ........... HSR ....JUN
2005/11/20 12:00 UTC ........... HSR ....JUN
2005/11/21 00:00 UTC ........... HSR ....JUN
2005/11/21 12:00 UTC ........... HSR ....JUN
2005/11/22 00:00 UTC ........... HSR ....JUN
2005/11/22 12:00 UTC ........... HSR ....JUN
2005/11/23 00:00 UTC ........... HSR ....JUN
2005/11/23 12:00 UTC ........... HSR ....JUN
2005/11/24 00:00 UTC ........... HSR ....JUN
2005/11/24 12:00 UTC ........... HSR ....JUN
2005/11/25 00:00 UTC ........... HSR ....JUN
2005/11/25 12:00 UTC ........... HSR ....JUN
2005/11/26 00:00 UTC ........... HSR ....JUN
2005/11/26 12:00 UTC ........... HSR ....JUN
2005/11/27 00:00 UTC ........... HSR ....JUN 
2005/11/27 12:00 UTC ........... HSR ....JUN 
2005/11/28 00:00 UTC ........... HSR ....JUN 
2005/11/28 12:00 UTC ........... HSR ....JUN 
2005/11/29 00:00 UTC ........... HSR ....JUN 
2005/11/29 12:00 UTC ........... HSR ....JUN 
2005/11/30 00:00 UTC ........... HSR ....JUN 
2005/11/30 12:00 UTC ........... HSR ....JUN 
2005/12/01 00:00 UTC ........... HSR ....JUN
2005/12/01 12:00 UTC ........... HSR ....JUN
2005/12/02 00:00 UTC ........... HSR ....JUN
2005/12/02 12:00 UTC ........... HSR ....JUN
2005/12/03 00:00 UTC ........... HSR ....JUN
2005/12/03 12:00 UTC ........... HSR ....JUN
2005/12/04 00:00 UTC ........... HSR ....JUN
2005/12/04 12:00 UTC ........... HSR ....JUN
2005/12/05 00:00 UTC ........... HSR ... JUN
2005/12/05 12:00 UTC ........... HSR ....JUN
 GAP
2006/04/16 00:00 UTC ........... HSR ....JUN
2006/04/16 12:00 UTC ........... HSR ....JUN
2006/04/17 00:00 UTC ........... HSR ....JUN
2006/04/17 12:00 UTC ........... HSR ....JUN
2006/04/18 00:00 UTC ........... HSR ....JUN
2006/04/18 12:00 UTC ........... HSR ....JUN
2006/04/19 00:00 UTC ........... HSR ....JUN
2006/04/19 12:00 UTC ........... HSR ....JUN
2006/04/20 00:00 UTC ........... HSR ....JUN
2006/04/20 12:00 UTC ........... HSR ....JUN
2006/04/21 00:00 UTC ........... HSR ....JUN
2006/04/21 12:00 UTC ........... HSR ....JUN
2006/04/22 00:00 UTC ........... HSR ....JUN
2006/04/22 12:00 UTC ........... HSR ....JUN
2006/04/23 00:00 UTC ........... HSR ....JUN
2006/04/23 12:00 UTC ........... HSR ....JUN
2006/04/24 00:00 UTC ........... HSR ....JUN
2006/04/24 12:00 UTC ........... HSR ....JUN
2006/04/25 00:00 UTC ........... HSR ....JUN
2006/04/25 12:00 UTC ........... HSR ....JUN
2006/04/26 00:00 UTC ........... HSR ....JUN
2006/04/26 12:00 UTC ........... HSR ....JUN
2006/04/27 00:00 UTC ........... HSR ....JUN 
2006/04/27 12:00 UTC ........... HSR ....JUN 
2006/04/28 00:00 UTC ........... HSR ....JUN 
2006/04/28 12:00 UTC ........... HSR ....JUN 
2006/04/29 00:00 UTC ........... HSR ....JUN 
2006/04/29 12:00 UTC ........... HSR ....JUN 
2006/04/30 00:00 UTC ........... HSR ....JUN 
2006/04/30 12:00 UTC ........... HSR ....JUN 
2006/05/01 00:00 UTC ........... HSR ....JUN
2006/05/01 12:00 UTC ........... HSR ....JUN
2006/05/02 00:00 UTC ........... HSR ....JUN
2006/05/02 12:00 UTC ........... HSR ....JUN
2006/05/03 00:00 UTC ........... HSR ....JUN
2006/05/03 12:00 UTC ........... HSR ....JUN
2006/05/04 00:00 UTC ........... HSR ....JUN
2006/05/04 12:00 UTC ........... HSR ....JUN
2006/05/05 00:00 UTC ........... HSR ... JUN
2006/05/05 12:00 UTC ........... HSR ....JUN
2006/05/06 00:00 UTC ........... HSR ....JUN
2006/05/06 12:00 UTC ........... HSR ....JUN
2006/05/07 00:00 UTC ........... HSR ....JUN
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2006/05/08 00:00 UTC ........... HSR ....JUN
2006/05/08 12:00 UTC ........... HSR ....JUN
2006/05/09 00:00 UTC ........... HSR ....JUN 
2006/05/09 12:00 UTC ........... HSR ....JUN
2006/05/10 00:00 UTC ........... HSR ....JUN
2006/05/10 12:00 UTC ........... HSR ....JUN
2006/05/11 00:00 UTC ........... HSR ....JUN
2006/05/11 12:00 UTC ........... HSR ....JUN
2006/05/12 00:00 UTC ........... HSR ....JUN
2006/05/12 12:00 UTC ........... HSR ....JUN
2006/05/13 00:00 UTC ........... HSR ....JUN
2006/05/13 12:00 UTC ........... HSR ....JUN
2006/05/14 00:00 UTC ........... HSR ....JUN 
2006/05/14 12:00 UTC ........... HSR ....JUN
2006/05/15 00:00 UTC ........... HSR ....JUN
2006/05/15 12:00 UTC ........... HSR ....JUN
2006/05/16 00:00 UTC ........... HSR ....JUN
2006/05/16 12:00 UTC ........... HSR ....JUN
2006/05/17 00:00 UTC ........... HSR ....JUN
2006/05/17 12:00 UTC ........... HSR ....JUN
2006/05/18 00:00 UTC ........... HSR ....JUN
2006/05/18 12:00 UTC ........... HSR ....JUN

2006/08/22 00:00 UTC ........... HSR ....JUN
2006/08/22 12:00 UTC ........... HSR ....JUN
2006/08/23 00:00 UTC ........... HSR ....JUN
2006/08/23 12:00 UTC ........... HSR ....JUN
2006/08/24 00:00 UTC ........... HSR ....JUN
2006/08/24 12:00 UTC ........... HSR ....JUN
2006/08/25 00:00 UTC ........... HSR ....JUN
2006/08/25 12:00 UTC ........... HSR ....JUN
2006/08/26 00:00 UTC ........... HSR ....JUN
2006/08/26 12:00 UTC ........... HSR ....JUN
2006/08/27 00:00 UTC ........... HSR ....JUN 
2006/08/27 12:00 UTC ........... HSR ....JUN 
2006/08/28 00:00 UTC ........... HSR ....JUN 
2006/08/28 12:00 UTC ........... HSR ....JUN 
2006/08/29 00:00 UTC ........... HSR ....JUN 
2006/08/29 12:00 UTC ........... HSR ....JUN 
2006/08/30 00:00 UTC ........... HSR ....JUN 
2006/08/30 12:00 UTC ........... HSR ....JUN 
2006/09/01 00:00 UTC ........... HSR ....JUN
2006/09/01 12:00 UTC ........... HSR ....JUN
2006/09/02 00:00 UTC ........... HSR ....JUN
2006/09/02 12:00 UTC ........... HSR ....JUN
2006/09/03 00:00 UTC ........... HSR ....JUN
2006/09/03 12:00 UTC ........... HSR ....JUN
2006/09/04 00:00 UTC ........... HSR ....JUN
2006/09/04 12:00 UTC ........... HSR ....JUN
2006/09/05 00:00 UTC ........... HSR ... JUN
2006/09/05 12:00 UTC ........... HSR ....JUN
2006/09/06 00:00 UTC ........... HSR ....JUN
2006/09/06 12:00 UTC ........... HSR ....JUN
2006/09/07 00:00 UTC ........... HSR ....JUN
2006/09/07 12:00 UTC ........... HSR ....JUN
2006/09/08 00:00 UTC ........... HSR ....JUN
2006/09/08 12:00 UTC ........... HSR ....JUN
2006/09/09 00:00 UTC ........... HSR ....JUN 
2006/09/09 12:00 UTC ........... HSR ....JUN
2006/09/10 00:00 UTC ........... HSR ....JUN
2006/09/10 12:00 UTC ........... HSR ....JUN
2006/09/11 00:00 UTC ........... HSR ....JUN
2006/09/11 12:00 UTC ........... HSR ....JUN
2006/09/12 00:00 UTC ........... HSR ....JUN
2006/09/12 12:00 UTC ........... HSR ....JUN
2006/09/13 00:00 UTC ........... HSR ....JUN
2006/09/13 12:00 UTC ........... HSR ....JUN
2006/09/14 00:00 UTC ........... HSR ....JUN 
2006/09/14 12:00 UTC ........... HSR ....JUN
2006/09/15 00:00 UTC ........... HSR ....JUN
2006/09/15 12:00 UTC ........... HSR ....JUN
2006/09/16 00:00 UTC ........... HSR ....JUN
2006/09/16 12:00 UTC ........... HSR ....JUN
2006/09/17 00:00 UTC ........... HSR ....JUN
2006/09/17 12:00 UTC ........... HSR ....JUN
2006/09/18 00:00 UTC ........... HSR ....JUN
2006/09/18 12:00 UTC ........... HSR ....JUN
2006/09/19 00:00 UTC ........... HSR ....JUN
2006/09/19 12:00 UTC ........... HSR ....JUN
2006/09/20 00:00 UTC ........... HSR ....JUN
2006/09/20 12:00 UTC ........... HSR ....JUN
2006/09/21 00:00 UTC ........... HSR ....JUN
2006/09/21 12:00 UTC ........... HSR ....JUN
2006/09/22 00:00 UTC ........... HSR ....JUN
2006/09/22 12:00 UTC ........... HSR ....JUN

  • Mount St. Helens Page - Event Counts and energy release.

  • SPECTROGRAM RECORDS From Dome Station SEP The accompanying Spectrograms from station SEP are for the same time periods as the webicorders. A Spectrogram is made by analyzing the frequency content of a time-window of trace data. The x-axis of the spectrogram represents frequency. Info on Spectrograms from the USGS

  • Red color indicates signal frequencies are concentrated between 4 Hz and 10 Hz (see frequency scale at bottom).
  • The signal waxes and wanes over several days

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