2024-03-29T15:33:58Z
https://repository.dl.itc.u-tokyo.ac.jp/oai
oai:repository.dl.itc.u-tokyo.ac.jp:00032576
2022-12-19T04:08:37Z
80:4535:4629:4630
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Comparison between ERI magnitude and moment magnitude based on theoretical source, path, and site effect
地震研究所マグニチュードとモーメントマグニチュードの関係の理論的考察
井出, 哲
125852
453
ERI magnitude
moment magnitude
omega-square model
constant stress drop scaling
constant Q
application/pdf
Magnitude of Earthquake Research Institute (ERI), University of Tokyo, ME, is determined using an empirical equation of Watanabe (1971). Based on the omega-square source model, constant stress drop scaling, constant Q, and instrumental response, we calculated a typical waveform for each event with a given seismic moment and MW to estimate its ME. This leads to theoretical relationships, which show 1)saturation for MW>6, 2)overestimation of ME for 3<MW<5, and 3) underestimation of ME for MW<2. Under MW 2, ME scales with 1.5MW, which may affect the estimation of b-value of the Gutenberg and Richter equation. Catalogue values of ME and MW for small and medium events show the predicted trend.
departmental bulletin paper
東京大学地震研究所
2003-03-31
application/pdf
東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo
4
77
337
342
AN00162258
00408972
https://repository.dl.itc.u-tokyo.ac.jp/record/32576/files/ji0774002.pdf
jpn