Two 1993 Kamchatka earthquakes

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...

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Bibliographic Details
Published in:Pure and Applied Geophysics PAGEOPH
Main Authors: Johnson, Jean M., Tanioka, Yuichiro, Satake, Kenji, Ruff, Larry J.
Other Authors: Department of Geological Sciences, University of Michigan, 48109-1063, Ann Arbor, MI, USA, Ann Arbor
Format: Article in Journal/Newspaper
Language:English
Published: Birkhäuser-Verlag; Birkhäuser Verlag 1995
Subjects:
Geosciences
Geophysics/Geodesy
Earthquake Parameters
Tsunamis
Earthquake Cycle
Physics
Atmospheric
Oceanic and Space Sciences
Science
Kamchatka
Online Access:https://hdl.handle.net/2027.42/43211
https://doi.org/10.1007/BF00874387
Description
Summary: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. Peer Reviewed http://deepblue.lib.umich.edu/bitstream/2027.42/43211/1/24_2004_Article_BF00874387.pdf

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