Recent Earthquakes

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

 Quakes Near Volcanoes

Seismicity in Last 30 Days

Volcano Earthquakes
St. Helens
30 Days Ago Now

Volcanoes without recent seismicity

Jefferson, Crater Lake, Glacier Peak, Three Sisters

Ongoing intense earthquake swarm on Oregon-Nevada border

Posted by S. Malone, 11/08/2014

The Celebrity Examiner and Oregon Public Broadcasting have brief stories on the ongoing swarm just south of the Oregon-Nevada border.  Even though this swarm is officially in Nevada's reporting region earthquakes in it are reported on the PNSN earthquake map and show up on many PNSN seismic stations in the area.

Here are the news releases on Nevada swarm from Oregon Department of Geology and Mineral Industries and Nevada Seismological Laboratory at University of Nevada, Reno.

Earthquake Safety Comic: "Without Warning!"

Posted by A. Ling, 10/31/2014

"Without Warning!" tells the story of Cascadia High School student, Angie as she must go rescue her little sister after a large Cascadia Subduction Zone earthquake. The stroy also provide some tips to help you prepare for earthquakes and tsunmais. This publication is a partnership between Dark Horse Comics and the Oregon Office of Emergency Management (OEM) with support from Cascadia Region Earthquake Workgroup (CREW) and Federal Emergency Management Agency (FEMA).

Volcanic eruptions in the Pacific Northwest could happen without warning

Posted by A. Ling, 09/29/2014

Mount Ontake in Japan erupted without warning on Saturday. UW geologist George Bergantz explains the sudden eruption of Japan's Mount Ontake on King 5 news. This type of eruption, known as phreatic eruption, is uncommon, but it could happen in Washington.

10 seconds of early warning for last weeks California earthquake

Posted by S. Malone, 09/01/2014

The Contra Costa Times and the Los Angeles Times have brief articles on the success of the California earthquake early warning system for last week's Mag=6 Napa Valley event.

Latest Seismo Blog Posts

Canadian ETS morphing to Washington one?

November 18, 2014

by Steve Malone

Over two weeks of tremor in central Vancouver Island has been progressing southward. Though we don't know about the geodetic component we suspect that this represents a slip event that is propagating southward. Since a southern Vancouver Island-Northern Puget Sound ETS is due about now the question is will this current activity continue all the way to southern Puget Sound. For some details.....

Great ShakeOut, Great success!

October 16, 2014

by Angel Ling

Congratulations and thank you for your participation in the Great ShakeOut Earthquake Drill! Hopefully it gave you a great opportunity to practice "Drop, Cover and Hold on", and review and update emergency preparedness plans and kits/supplies. Thanks again to make the Pacific Northwest safer. Read more to see what the Great Washington ShakeOut looks like at the PNSN!

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.