論文

査読有り 本文へのリンクあり
2019年6月16日

Event Size Distribution of Shallow Tectonic Tremor in the Nankai Trough

Geophysical Research Letters
  • Masaru Nakano
  • ,
  • Suguru Yabe
  • ,
  • Hiroko Sugioka
  • ,
  • Masanao Shinohara
  • ,
  • Satoshi Ide

46
11
開始ページ
5828
終了ページ
5836
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1029/2019GL083029
出版者・発行元
American Geophysical Union ({AGU})

©2019. American Geophysical Union. All Rights Reserved. Slow earthquake size distributions have been found to follow either a power law or an exponential law, depending on the data set. We investigated the size distribution of shallow tectonic tremor events along the Nankai trough, southwestern Japan, observed in 2009, 2015, 2016, and 2018 and estimated the seismic energy radiated during the events as a measure of event size. The obtained size distributions mostly followed a power law with a b value of about 1, but an exponential law also fits well the data of the largest events; this result indicates that the size distribution follows the Gutenberg-Richter law with an exponential taper. If only the largest events were observed, an exponential size distribution would be obtained. This exponential taper could be attributed to a source fault limitation. Because the maximum event size differed among activity periods, the source fault size varied among them, although the source areas largely overlap.

リンク情報
DOI
https://doi.org/10.1029/2019GL083029
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85067674293&origin=inward 本文へのリンクあり
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85067674293&origin=inward
URL
http://orcid.org/0000-0003-0278-0242

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