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| DOI | 10.1029/2019GL085763 |
| A Multi-Array Back-Projection Approach for Tsunami Warning | |
| Xie Y.; Meng L. | |
| 发表日期 | 2020 |
| ISSN | 0094-8276 |
| 卷号 | 47期号:14 |
| 英文摘要 | Recent development of dense strong-motion networks and seismic array processing enables rapid tsunami predictions based on the back-projection (BP) approach. We develop a multi-array local BP method (MLBP) using seismic networks with epicentral distance from 0.7° to 3.5°. The local BPs using individual arrays are first calculated and are then merged into a single image of the rupture process. This multi-array approach circumvents the issue of artifact in single-array BP caused by the overlapping of multiple phases and coda waves. Based on the local BP approach, tsunami predictions are available 7 min after the origin time. Case studies of the 2003 Mw 8.1 Tokachi-oki and the 2011 Mw 9.0 Tohoku earthquakes show that their rupture zones are well resolved and are comparable with principal slip areas inferred from tsunami observations. The amplitude and arrival time errors of the predicted tsunami waves are within −1.59 to 3.74 m and −10.0 to 10.0 min, which are sufficiently small for warning purposes. ©2020. American Geophysical Union. All Rights Reserved. |
| 英文关键词 | Earthquake effects; Tsunamis; Back projection; Epicentral distances; Rupture process; Seismic networks; Strong motion; Tohoku earthquakes; Tsunami warning; Tsunami waves; Array processing; arrival time; back analysis; coda; earthquake epicenter; image analysis; rupture; seismic data; slip; strong motion; tsunami event; Hokkaido; Honshu; Japan; Tohoku; Tokachi |
| 语种 | 英语 |
| 来源期刊 | Geophysical Research Letters
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/170109 |
| 作者单位 | Earth, Planetary and Space Sciences, University of California, Los Angeles, CA, United States |
| 推荐引用方式 GB/T 7714 | Xie Y.,Meng L.. A Multi-Array Back-Projection Approach for Tsunami Warning[J],2020,47(14). |
| APA | Xie Y.,&Meng L..(2020).A Multi-Array Back-Projection Approach for Tsunami Warning.Geophysical Research Letters,47(14). |
| MLA | Xie Y.,et al."A Multi-Array Back-Projection Approach for Tsunami Warning".Geophysical Research Letters 47.14(2020). |
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