Nelson et al. (2015) visited Chirikof Island and documented stratigraphic evidence of 13 tsunamis deposited in the last 3,500 years (including 1788+1938). This work showed high tsunamis are more frequent than previously thought, occurring every 180-270yrs
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RT @seismo_steve: @jiangyuinsar @pabloj_gonzalez Records of tsunami deposits show significant tsunamis in 1788, 1880 and 1938 (https://t.co…
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@BaoningWu @patton_cascadia @jiangyuinsar Early indication is that the rupture initiated not far away from the epicenter of M7.8 2020 (at the far east end of the Shumagin gap), but the rupture of this M8.2 propagated towards east into the Semidi segment.