Abstract
Two earthquakes occurred in 1993 off southern Kamchatka. They have similar surface wave magnitudes, focal mechanisms, and depths, but have distinctly different characteristics. The November earthquake is a standard or “impulsive” M7 underthrusting event. The June earthquake is a tsunamigenic or “low-stress-drop” event with several unusual characteristics, including a large, diffuse aftershock zone, directivity, and a long source time function. The 1993 earthquakes ruptured a segment of the Kamchatka Arc which has not ruptured since 1904. The 1993 earthquakes seem to signal the midpoint in the southern Kamchatka seismic cycle.
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© 1995 Birkhäuser Verlag, Basel
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Johnson, J.M., Tanioka, Y., Satake, K., Ruff, L.J. (1995). Two 1993 Kamchatka Earthquakes. In: Imamura, F., Satake, K. (eds) Tsunamis: 1992–1994. Pageoph Topical Volumes. Birkhäuser Basel. https://doi.org/10.1007/978-3-0348-7279-9_15
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DOI: https://doi.org/10.1007/978-3-0348-7279-9_15
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