Recent Earthquakes

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

 Quakes Near Volcanoes

Seismicity in Last 30 Days

Volcano Earthquakes
St. Helens
Crater Lake
30 Days Ago Now

Volcanoes without recent seismicity

Adams, Glacier Peak, Jefferson, Three Sisters

Mag=7.2 Earthquake near Acapulco, Mexico today

Posted by S. Malone, 04/18/2014

An earthquake near Acapulco is strongly felt in Mexico City.  Several reports in USA Today, Fox News and NY Daily News. And official USGS Page.

Devastating sequence of earthquakes in Nicaragua

Posted by S. Malone, 04/11/2014

A series of large earthquake including the case where an "aftershock" (M=6.6) is larger than what was thought to be the "mainshock"  (M=6.1).  Many different news articles including: ABC news, Christian Science Monitor, CBS news, and others.....

What would happen if an earthquake hit in Kittitas County?

Posted by B. Steele, 04/08/2014

Earthquakes occur east of the Cascades. A recent study looks at the costs.

A ’64 Quake Still Reverberates

Posted by B. Steele, 04/07/2014

Fifty years after the landmark 9.2 Alaska earthquake and tsunami Chile experiences another great earthquake. The Alaska quake got scientists thinking about Cascadia. NY Times

Latest Seismo Blog Posts

PNSN instruments picked up the ground vibrations generated by the deadly Oso landslide.

Legacy web site content returns

March 17, 2014

by Steve Malone

Two years ago the PNSN web site changed format in a big way. New features and capabilities were added and the look and feel was greatly improved. But, many of the old popular pages were left behind. We have now converted many of these pages to generic documents that can be linked from the new pages but are still in the old format. For a summary of what we have now....

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.