Recent natural and manmade seismic activity. Click figure for details.
Quakes Near Volcanoes
Seismicity in Last 30 Days
Volcanoes without recent seismicity
Posted by A. Ling, 04/28/2015
The Seattle Times and UW News have a report on University of Washington Earth and Space Sciences professor Heidi Houston’s research on slow-slip quakes in the Pacific Northwest. The study shows that the gravitational pull of the sun and the moon affect the Cascadia Fault a few days after it has started slipping.
Posted by A. Ling, 02/12/2015
ShakeAlert, the Pacific Northwest region's Earthquake Early Warning System, has begun testing by selected users. These videos show the example simulations of a M8.0 Cascadia offshore earthquake and the 2001 M6.8 Nisqually earthquake on PNW ShakeAlert User Display.
Posted by S. Malone, 02/11/2015
The Seattle Times has a report on PNW Earthquake Early Warning's first test.
Posted by A. Ling, 02/11/2015
UW News: The first early earthquake warning system for the region has begun testing with a small group of users at businesses and public agencies.
Latest Seismo Blog Posts
February 18, 2015
by Steve Malone
January 19, 2015
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.