Latest Earthquakes at Mount Hood

Time vs. Depth plots of Mount Hood earthquakes for the past year.

Time-Depth, map, and cross sections of Mount Hood earthquakes for the past decade.

Webicorder Records, including seismometers near Mount Hood.

Last updated Sun Oct 25 16:38:31 PDT 2009

Number of well-located eqs (quality CC or better) in last month = 3

List and Map of 20 most recent (quality CC or better): 

(Note: Times are in GMT => subtract 8 hours to get PST, 
    7 hours to get PDT)

 DATE-(UTC)-TIME   LAT(N) LON(W)   DEP  MAG QUAL COMMENTS
yy/mm/dd hh:mm:ss   deg.   deg.    km   Ml
08/10/18 12:27:58  45.35N 121.69W   4.8 0.1  AC
08/10/18 17:57:27  45.29N 121.70W   4.1 0.2  BC
08/10/20 03:58:55  45.30N 121.70W   4.8 0.5  AC
08/11/16 06:33:32  45.31N 121.74W   3.5 1.2  BC
08/11/17 13:13:18  45.36N 121.68W   4.7 1.1  AC
08/11/18 16:05:58  45.36N 121.69W   4.2 1.8  BB
09/01/23 18:53:51  45.28N 121.74W   8.9 0.9  BB
09/01/23 19:48:03  45.29N 121.75W   8.8 1.7  BA
09/01/24 00:23:47  45.29N 121.75W   8.3 1.8  AA
09/02/12 10:43:03  45.30N 121.64W   8.3-0.3  AC
09/02/18 20:23:12  45.34N 121.68W   6.2 1.0  AB
09/05/29 14:20:16  45.32N 121.68W   7.8 1.2  BB
09/08/23 06:18:11  45.29N 121.74W   7.4 1.0  BA
09/08/23 08:43:42  45.29N 121.73W   6.4 1.3  BB
09/08/23 21:00:58  45.28N 121.72W   7.1 1.1  BC
09/08/24 13:12:32  45.30N 121.67W   9.6-0.1  BC
09/09/23 03:36:26  45.37N 121.71W   0.0 1.0  CC
09/09/26 05:37:53  45.36N 121.68W   3.9 2.0  BB
09/10/25 13:20:55  45.36N 121.69W   3.0 0.5  BC
09/10/25 13:21:53  45.35N 121.69W   5.0 0.6  AC

List of all earthquakes (quality DD or better) occurring this year near Mt. Hood.

Map Guide:

• Red dot represents most recent event.
• Green dots represent four previous events.
• Circles represent older events.
• Black triangles represent PNSN seismic stations. Stations are labeled with their names.
• Black star represents Mount Hood summit.
• Magnitude scale is at lower right. Distance scale is at lower left.

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