Characteristics of earthquake sequences in the Kuril Islands
Abstract
A total of 6 earthquake sequences that occurred in the Kuril Islands region in 1964–1976 has been collected and their characteristics have been analyzed. When these sequences are judged from the spatial relation between their source distribution and the subduction zone, all of them belong to plate boundary earthquake sequences. The parameters of 5 ones among these sequences, which are located just in the subduction zone, are in fair agreement. For these 5 sequences, the major axis of epicenter distribution area is longer; the ratio of major axis to minor axis is high; the focal depths have a greater range; the directions of dip are consistent with the direction of subduction; the dip angles are of moderate value. It is estimated that the only exception is related to the low accuracy of data in the early stage.
Key words
Kuril Islands earthquake sequence plate boundary earthquakePreview
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