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 6 22 3
Mount Adams 0 0 0
Mount St. Helens 2 10 22
Mount Hood 0 10 0
Mount Jefferson 0 0 0
Three Sisters 0 0 0
Newberry 2 15 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.

Earthquake Early Warning Developments

Posted by B. Steele, 11/08/2013

KIRO Special Report on EEW developments for our region.
Read More >>

Quake risks look more severe on Hanford site

Posted by B. Steele, 11/04/2013

A new report by an anti-nuclear organization says earthquake risks were seriously underestimated when the state’s only commercial nuclear-power plant was built almost 30 years ago on the Hanford nuclear reservation.
Read More >>

Preparing for Earthquakes

Posted by P. Bodin, 10/27/2013

News story from National Public Radio. Earthquakes may not be predictable, but our knowledge of where they are likely to occur, and to predict what will happen when they do is getting pretty good. We know more about what structures are most at risk, too. Be prepared!

Seismically induced landslides threaten Seattle

Posted by B. Steele, 10/23/2013

UW's Kate Allstadt published a paper with Professor John Vidale and USGS ground motion expert Art Frankel that uncovers a significant landslide hazard to add to the other impacts of a big Seattle Fault quake.
Read More >>

Latest Seismo Blog Posts

Large Mount Baker debris Avalanche this fall

October 29, 2013

by Steve Malone

Every few years a buildup of ice and snow on the north and west side of Sherman Peak (Mount Baker) produces a large debris avalanche that can go several kilometers down the Boulder Glacier. Such an event occurred recently as determined by a pilot report (with photos). Searching the seismic records for Mount Baker seismographs turned up the seismic signal for this event on the afternoon of Oct 21, much later in the year than for previous such events. For more details.....
Read More >>

Speedy ETS in the works

September 16, 2013

by Steve Malone

It seems that the expected ETS of Oct-Nov, 2013 is already underway. Significant tremor started on Sep 7 in south Puget Sound and has already moved into southern Vancouver Island. This one seems both early and speedy with strange jumps. Update on Oct 11, 2013: It is over. This one went from Sep 7 - Oct 8, 2013. For all the details of this whole event......
Read More >>

Quick Links

 

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.