![]() ![]() The early warning notification program was implemented with its reliability contingent upon unknown future funding, but with the election of Donald Trump "future funding is uncertain" according to Washington Congressman Derek Kilmer. A magnitude 4.3 earthquake in February 2015 showed that the present architecture of the network results in a significant delay in the early warning notification program, depending upon the location of the quake, leading to proposals to again expand the network. After an earthquake on Januthe network's emergency notification system failed. The network was significantly expanded after the damaging 2001 Nisqually earthquake. The PNSN, in conjunction with the Cascades Volcano Observatory of the USGS, now monitors seismicity at all the Cascade volcanoes in Washington and Oregon. Helens eruption, monitoring was expanded to other Cascade Mountains volcanoes. After successfully using seismic activity to predict the 1980 Mt. Helens and other Cascade Volcanos leading up to the deadly May 18 eruption and in the years following.Įarthquakes are recorded frequently beneath Mount St. On March 27th the first steam and ash explosion occurred. ![]() Helens and by March 1980 predicted an eruption was likely to occur "soon". Early in 1980 PNSN scientists detected unrest under Mt. ![]() This event spurred the installation of the Pacific Northwest Seismic Network in 1969 to monitor regional earthquake activity. The M6.5 1965 Puget Sound earthquake shook the Seattle, Washington area, causing substantial damage and seven deaths. PNSN monitors volcanic and tectonic activity, gives advice and information to the public and policy makers, and works to mitigate earthquake hazard.ĭamaging earthquakes are well known in the Pacific Northwest, including several larger than magnitude 7, most notably the M9 1700 Cascadia earthquake and the M7.0–7.3 earthquake in about 900AD on the Seattle Fault. The Pacific Northwest Seismic Network, or PNSN, collects and studies ground motions from about 400 seismometers in the U.S. JSTOR ( December 2016) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Pacific Northwest Seismic Network" – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification. ![]()
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