2024-03-29T08:04:17Z
https://soar-ir.repo.nii.ac.jp/oai
oai:soar-ir.repo.nii.ac.jp:00012669
2022-12-14T04:08:14Z
1221:1222
Scale-dependence of seismic energy-to-moment ratio for strike-slip earthquakes in Japan
Izutani, Y
Kanamori, H
We analyzed four pairs of a large (M-w approximate to 6) and a small (M-w approximate to 3.5 to 4) shallow strike-slip earthquakes to investigate the scale-dependence of the seismic energy-to-moment ratio, an important macroscopic parameter which reflects the basic physical process of seismic slip. These earthquakes occurred in the south-western part of Japan, and high-quality close-in records (epicentral distance < 50 km) are available for both the small and large earthquakes. The paired events have almost the same focal mechanism and hypocenter location. We used the spectral ratio of the paired events in order to remove the effects of attenuation along the wave propagation path and the station site response. We then estimated the seismic energy from the source spectra estimated from the spectral ratio. The energy-to-moment ratio increases with the earthquake size. This scale-dependence is very similar to that found earlier for earthquakes in Southern California.
Article
GEOPHYSICAL RESEARCH LETTERS. 28(20): 4007-4010 (2001)
journal article
AMER GEOPHYSICAL UNION
2001-10-15
application/pdf
GEOPHYSICAL RESEARCH LETTERS
20
28
4007
4010
0094-8276
AA00657102
https://soar-ir.repo.nii.ac.jp/record/12669/files/2001_Izutani_Kanamori_GRL.pdf
eng
http://www.agu.org/pubs/crossref/2001/2001GL013402.shtml
http://www.agu.org/pubs/crossref/2001/2001GL013402.shtml
10.1029/2001GL013402
https://doi.org/10.1029/2001GL013402
Copyright© 2001 American Geophysical Union.