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タイトル: | Systematic Detection of Short‐Term Slow Slip Events in Southcentral Alaska |
著者: | Okada, Yutaro Nishimura, Takuya ![]() ![]() ![]() |
著者名の別形: | 岡田, 悠太郎 西村, 卓也 |
キーワード: | short-term slow slip event southcentral Alaska |
発行日: | 16-Sep-2023 |
出版者: | American Geophysical Union (AGU) |
誌名: | Geophysical Research Letters |
巻: | 50 |
号: | 17 |
論文番号: | e2023GL104901 |
抄録: | Slow slip events (SSEs) are important for the slip budget along a megathrust fault. Although the recurrence of weeks-long short-term SSEs (S-SSEs) in southcentral Alaska has been suggested, a large amount of noise prevented us from detecting discrete events. We applied a systematic detection method to Global Navigation Satellite System data and detected 31 S-SSEs during the 14-year analysis period. The events mainly occurred at a depth from 35 to 45 km at a down-dip extension of the 1964 Alaska earthquake, and the active clusters correlated with the region of the subducting Yakutat microplate. A large cumulative slip of S-SSEs indicated a significant contribution to stress transfer along the plate interface, and its source area spatially coincided with that of the long-term SSEs and the afterslip of the 1964 earthquake. Large and recurrent S-SSEs are key phenomena for understanding interplate slip kinematics in this region. |
著作権等: | © 2023. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
URI: | http://hdl.handle.net/2433/286212 |
DOI(出版社版): | 10.1029/2023gl104901 |
出現コレクション: | 学術雑誌掲載論文等 |
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