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, Three Sisters

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.

Mag 6.0 Earthquake in California this morning

Posted by S. Malone, 08/24/2014

The Seattle Times has a lengthy story on the M=6.0 earthquake in the Napa Valley area of northern California this morning. There is a good scientific tectonic summary by the US Geologic Survey.

Some controversy in Earthquake Early Warning

Posted by S. Malone, 08/14/2014

MarketPlace news has a report on the "controversy" between a private version of EEW and the US Geological Survey sponsored version (in which the PNSN is participating).  While there are some mistakes in this report it does summarize some important issues: a cheap, semi-secret, private EEW versus a more expensive, open-information, public EEW.

Latest Seismo Blog Posts

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 Great ShakeOut 2014 is Tomorrow!

October 15, 2014

by Angel Ling

Tomorrow is the Great Washington Shake Out 2014! Please join us in the World's largest Earthquake Drill at 10:16 a.m. on October 16. Read more...

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.