It was perhaps due.ĭavies made his prediction after field campaigns in the 1970s, during which he and his co-workers had installed seismometers near Popof Island, upon which the village of Sand Point (population 1,140) sits. There, they wrote, was a swath of one of the world’s great subduction zones that had not ruptured in a long time. In it, Davies and his co-workers proposed a “seismic gap” just south of Sand Point. (Graphic courtesy Alaska Earthquake Center) But he was quick to point out a scientific paper written by the first Alaska state seismologist, John Davies, in 1981.Īll the large recent earthquakes on the Aleutian Subduction Zone, including the magnitude 7.8 in the “Shumagin Gap” that occurred July 21, 2020. West and his colleagues at the University of Alaska Fairbanks Geophysical Institute were still awash in data one day after the event. Reports of 6-inch waves on the shores of Sand Point were among the highest recorded for the event. Alaska time did not cause a damaging tsunami. To West’s relief, the magnitude 7.8 earthquake that happened at 10:12 p.m. His second thought was that a longstanding earthquake mystery may have just been solved. His first thought was that this - the biggest earthquake on the planet so far in 2020 - would cause a devastating tsunami. His phone informed him of a large earthquake beneath the ocean, just south of the Alaska Peninsula, about 60 miles southeast of the village of Sand Point. Late Tuesday, state seismologist Michael West heard a text alarm.
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