Recent Earthquakes

Recent natural and manmade seismic activity.  Click figure for details.

 Quakes Near Volcanoes

Volcano Last Week Last Month Average Month
Mount Baker 0 0 0
Glacier Peak 0 0 0
Mount Rainier 4 14 3
Mount Adams 0 0 0
Mount St. Helens 5 8 22
Mount Hood 1 2 0
Mount Jefferson 0 0 0
Three Sisters 0 0 0
Newberry 0 0 0
Crater Lake 0 0 0

The number of earthquakes located at each major Cascade volcano.  The average shown is the median number at each volcano for the past 4 decades.  Bold letters indicate more-than-average seismicity in the past month.

Earthquakes in the News

Parts of Christchurch will not be rebuilt

Posted by J. Vidale, 02/03/2012

 NZ Stuff  The soft downtown areas of Christchurch may never be rebuilt after last year's quake.

Alaska's Cleveland Volcano threatening to erupt

Posted by J. Vidale, 02/02/2012

Wired Science  It's bulging (pic from 2006).

First line of tsunami defense - mangroves

Posted by J. Vidale, 02/01/2012

 PR Web  Not new news, but the story is proving true.

M6.2 hurts 100 people in Peru

Posted by J. Vidale, 01/31/2012

 SFGate  Quake-prone Peru suffers again.

Latest Seismo Blog Posts

Another hum around Mount St. Helens

February 2, 2012

by John Vidale

We've seen jet planes, helicopters, and glaciers - now water releases from dams and hydroelectric generators may be appearing in our seismograms.

Slow slip: A new kind of earthquake under our feet

January 31, 2012

by John Vidale

A science digression: Sandwiched between the shallow region of sudden, infrequent earthquakes and the deeper home to continuous viscous motion lies an intermediate realm of intermittent sliding and rumbling. Discovered in recent years, it still harbors many secrets.

The PNSN reduces risk within the states of Washington and Oregon by

  • monitoring ground motions within the region in order to better understand earthquake and volcano hazards and their impacts on the physical, economic, political, and social environment,
  • providing the most accurate information about earthquakes and volcanoes as rapidly as possible to public officials, the public, and for education, and
  • advocating comprehensive and cost-effective measures for reducing the harmful effects of earthquakes and volcanoes.