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

Adams, Baker, Jefferson, Crater Lake, Glacier Peak

"The Really Big One" Public Forum

Posted by A. Ling, 07/31/2015

A public forum on earthquake hazards and preparedness in the Pacific Northwest will be held at Unviersity of Oreogn on August 6 from 7pm to 9pm. The event will be streamed live on the Internet via the UO Channel and you can follow the discussion on Twitter at ‪#‎TheReallyBigOne‬.

How to Stay Safe When the Big One Comes

Posted by A. Ling, 07/28/2015

Author of The New Yorker article "The Really Big One" Kathryn Schulz provides some advice about how best to prepare for the Cascadia earthquake and tsunami, and their aftermath that was missing in the first article. The Seattle Times also provide a great survival guide.

Breaking Down the MEGA-earthquake Threat

Posted by A. Ling, 07/20/2015

PNSN Outreach and Public Information Director Bill Steele talked about the threats of Cascadia Earthquake to the Pacific Northwest on KING5 New Day Northwest.

Q&A on CSZ Earthquake Risk and Preparedness

Posted by A. Ling, 07/14/2015

Do you have any questions about Cascadia earthquake after reading the The New Yorker's article? You can find your answer on Reddit “Ask Me Anything” about ‪Seattle‬ earthquake risk and preparedness and KIRO7 Facebook post.

Latest Seismo Blog Posts

Why earthquakes disappear

May 31, 2015

by Renate Hartog

Earthquakes have been appearing and disappearing from the U.S.G.S. webpages, this blog explains why.

PNW Earthquake Early Warning prototype goes live

February 18, 2015

by Steve Malone

Earthquake Early Warning (EEW) is now officially working for the Pacific Northwest (Washington and Oregon) in the same way it has in California for the past two years. It even got tested the first night in operations and worked...sort of. A workshop hosted by the PNSN at the University of Washington on Feb 17 introduced the topic and featured software to a group of about forty invited participants. For a few details on the workshop and the system's first live test......

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.