ダウンロード数: 49
このアイテムのファイル:
ファイル | 記述 | サイズ | フォーマット | |
---|---|---|---|---|
2022GL098029.pdf | 3.22 MB | Adobe PDF | 見る/開く |
タイトル: | The Origin of Large, Long-Period Near-Fault Ground Velocities During Surface-Breaking Strike-Slip Earthquakes |
著者: | Kaneko, Yoshihiro https://orcid.org/0000-0003-2342-0131 (unconfirmed) Goto, Hiroyuki https://orcid.org/0000-0002-4397-154X (unconfirmed) |
著者名の別形: | 金子, 善宏 後藤, 浩之 |
キーワード: | earthquake source physics strong ground motion dynamic rupture simulations |
発行日: | 28-May-2022 |
出版者: | American Geophysical Union (AGU) |
誌名: | Geophysical Research Letters |
巻: | 49 |
号: | 10 |
論文番号: | e2022GL098029 |
抄録: | Records of near-fault ground motions from recent surface-breaking earthquakes are characterized by large (> a few m/s), long-period (a few seconds) ground velocity pulses, which may pose significant hazard for tall buildings and large infrastructures. Yet, the generation mechanism is not well understood. Here, using spontaneous rupture simulations, we examine the origin of large velocity pulses observed during the 2016 Mw7.0 Kumamoto (Japan) earthquake. We show that near-fault waveform data as well as seismologically estimated moment and radiated energy can be well reproduced by a relatively simple model with uniform along-strike pre-stress and frictional properties. Our results suggest that large, long-period ground velocities are caused by the dynamic interaction of propagating rupture and the Earth's surface, which is enhanced by reflected waves from the boundaries of low-velocity layers. Such a generic mechanism suggests that large, long-period ground motion is a common occurrence in near-fault regions during surface-breaking, strike-slip earthquakes. |
著作権等: | © 2022. American Geophysical Union. The full-text file will be made open to the public on 28 November 2022 in accordance with publisher's 'Terms and Conditions for Self-Archiving' |
URI: | http://hdl.handle.net/2433/274192 |
DOI(出版社版): | 10.1029/2022GL098029 |
出現コレクション: | 学術雑誌掲載論文等 |
このリポジトリに保管されているアイテムはすべて著作権により保護されています。