The seismicity of northwest North America will be in the spotlight when the 2019 Annual Meeting of the Seismological Society of America convenes 23–26 April in Seattle. The region’s most recent significant seismic activity dates back more than a decade to the 2008 eruption of Mt. St. Helens, and the Pacific Northwest Seismic Network, or PNSN, vigilantly maintains its extensive monitoring throughoutWashington and Oregon in order to pick up the first signs of future activity. Front: PNSN station HSR, on Mt. St. Helens South Ridge, is shown during a routine maintenance visit by field engineers; Oregonâ€™s Mt. Hood can be seen in the distance at right (photo by Karl Hagel). Back: Seattle’s iconic Space Needle towers over another routine PNSN maintenance stop to station CTR, located at Seattle Center; note the Mural Amphitheater in the foreground (photo by Doug Gibbons).
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