Recent natural and manmade seismic activity. Click figure for details.
Quakes Near Volcanoes
Seismicity in Last 30 Days
|30 Days Ago Now|
Volcanoes without recent seismicity
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.
Posted by S. Malone, 08/10/2014
The Seattle Times has a very good discussion of the different interpretations of deep-sea geologic evidence for the frequency and size of our big earthquakes. There is no question that they occur, just what some of the evidence for their frequency means. A more garbled view of the controversy was in the science journal, Nature, last week.
Posted by S. Malone, 07/20/2014
The iMUSH active experiment will start this Tuesday (Jul 22) night with a number of explosions being set off in boreholes in the general Mount St. Helens area. The PNSN is making available realtime seismic data from our stations for iMUSH scientists (and anyone) to monitor these shots as they occur. See the iMUSH blog entry for these realtime recordings.
Posted by S. Malone, 06/20/2014
A crew of 15+ scientists in up to 7 vehicles are installing seismic stations in the Mount St. Helens area for a two year experiment. Checkout the almost daily updates and less frequent blogs for the iMUSH experiment on its WEB PAGE (imush.org).
Latest Seismo Blog Posts
July 29, 2014
by Steve Malone
May 15, 2014
by Steve Malone
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.