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 1 2 3
Mount Adams 0 0 0
Mount St. Helens 5 27 22
Mount Hood 0 0 0
Mount Jefferson 0 0 0
Three Sisters 0 0 0
Newberry 0 0 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.

Yet another rattle in New Zealand

Posted by J. Vidale, 05/15/2012

 New Zealand Herald  "Now THAT was a big truck going past! Monitors wobbling and people jumping under their desks here at work. Haven't felt one in ages."

 

Massive and rapid changes in a submarine volcano

Posted by J. Vidale, 05/14/2012

 Wired  The Eruption blog has a nice summary of the contortions observed on a submarine Kermadec volcano.

Detailed rupture simulation from Caltech

Posted by J. Vidale, 05/12/2012

 Futurity  (technical)  Researchers are attempting to simulate the range of behaviors seen on the San Andreas near Parkfield, and it is not simple.

Quake-resilient balloon cell phone towers

Posted by J. Vidale, 05/10/2012

 Geek  In an emergency, cell towers would fly to stay above the shaking and the tsunamis.

Latest Seismo Blog Posts

PNSN catalog near Mount St Helens

May 14, 2012

by John Vidale

The many seismic incidents recorded by the PNSN show a variety of natural and unnatural activities. Today we show, without much interpretation, the activity since 1980 at and northwest of Mount St Helens .

Slowly unzipping fault seen offshore

May 5, 2012

by John Vidale

A patch of the Gofar transform fault on the East Pacific Rise breaks in a repeatable way, with a distinct and characteristic week-long precursory seismicity pattern. If other faults behave similarly, there could be signs of impending earthquakes.

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.