Pacific Northwest Seismic Network, Kartoniert / Broschiert

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Pacific Northwest Seismic Network, or PNSN collects and studies ground motions from about 400 seismometers in Oregon and Washington to monitor volcanic and tectonic activity, and gives advice and information, and works to mitigate earthquake hazard. Damaging earthquakes are well known in the Pacific Northwest, including several larger than magnitude 7, most notably the M9 Cascadia earthquake in 1700AD and the M7.2 earthquake in about 900AD on the Seattle Fault. In 1965, a magnitude 6.5 earthquake shook the Seattle, Washington, area causing substantial damage and seven deaths. This event spurred the installation of the Pacific Northwest Seismic Network (PNSN) in 1969 to monitor regional earthquake activity.