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Geophysical Research Letters
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The moment release rate in the Kodiak Island (KI) segment increased prior to the great 1964 Prince William Sound earthquake (M(w) = 9.2). Starting in 1983 the moment release rate in the Shumagin Island (SI) segment shows a similar increase. In July 1990, an outer-rise reverse earthquake showed are-normal compression at a depth of 42 km seaward of the Alaska Peninsula (AP) segment. Because accelerating moment release and are-normal compression have both been proposed as precursors to large and great earthquakes, we suggest this is evidence that the SI-AP region is nearing the end of the seismic cycle between large thrust earthquakes.
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