publication . Article . 1984

Seismicity patterns (1963-1983) as stress indicators in the Shumagin seismic gap, Alaska

Hauksson, Egill; Armbruster, John; Dobbs, Steven;
Open Access
  • Published: 01 Dec 1984
  • Publisher: Seismological Society of America
  • Country: United States
Abstract
Earthquakes (1963 to 1983) of magnitude 5.0 to 6.5 form a rim of high seismic activity around a central region of relative seismic quiescence that coincides with the Shumagin seismic gap. This pattern, which can be inferred both from local network and teleseismic earthquake locations, shows high activity near the eastern and western ends of the seismic gap and along the down-dip end of the main thrust zone. The rim of seismicity surrounding an area of seismic quiescence may reflect strong couplign along the elastic-brittle part of the plate boundary where the great earthquakes occur. The temporal behavior of the microseismicity recorded by the Shumagin network i...
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Article . 1984
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