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SOURCE PARAMETERS RELEVANT TO HETERO-GENEITY OF A FAULT PLANE
IZUTANI, Yasuo
Accelerograms due to 16 earthquakes with JMA magnitude from 5.5 to 7.4 are analyzed. Second corner frequencies for the earthquakes are in a range from 1 to 8 Hz, and ratios of the rms stress-drop to the global stress-drop are from 2 to 10. The second corner frequency increases with the ratio of the rms stress-drop to the global stress-drop, and it is almost independent of the characteristic length of the fault plane. Based on stochastic source models, the second corner frequency is inversely proportional to an average size of element faults constituting a fault plane, so that the present result suggests that the average size decreases with increase in the heterogeneity of stress-drop on the fault plane. Also, the result implies that the average size of element faults is almost independent of the entire fault size for the earthquakes analyzed in this study.
Article
Journal of Physics of the Earth. 32(6):511-529 (1984)
journal article
CENTER ACADEMIC PUBL JAPAN
1984
application/pdf
Journal of Physics of the Earth
6
32
511
529
0022-3743
AA00704960
https://soar-ir.repo.nii.ac.jp/record/12439/files/SOURCE_PARAMETERS_RELEVANT_HETERO-GENEITY.pdf
eng
10.4294/jpe1952.32.511
https://doi.org/10.4294/jpe1952.32.511
Copyright© 1984 The Seismological Society of Japan; The Geodetic Society of Japan; The Volcanological Society of Japan