Accelerating moment release (amr) before strong earthquakes: a retrospective case study of a controversial precursor
文献类型：期刊论文
| 作者 | Jiang Chang-Sheng1; Wu Zhong-Liang1,2 |
| 刊名 | Chinese journal of geophysics-chinese edition
 |
| 出版日期 | 2009-03-01 |
| 卷号 | 52期号:3页码:691-702 |
| 关键词 | Yutian m(s)7.3 earthquake Accelerating moment release (amr) Critical-point-like model of earthquakes Seismic moment release mapping |
| ISSN号 | 0001-5733 |
| 通讯作者 | Jiang chang-sheng(jiangcs@cea-igp.ac.cn) |
| 英文摘要 | Since recent years there has been the controversy on whether accelerating moment release (amr) can be regarded as a reliable intermediate-term precursor of strong earthquakes with generality. taking the march 21, 2008, yutian, xinjiang, m(s)7.3 earthquake as an example, we conducted a case study focusing on the reliability and physical relevance of amr. we investigate the generality of amr by mapping m, the exponent in the power-law-like 'time-to-failure' function describing the moment release. in the (t,r,m-c) space, where t and r are the scales of temporal and spatial window, respectively, and m-c is the cutoff magnitude of earthquake catalogue in use. various factors potentially affecting the result are considered. it is observed that declustering of catalogues has less influence on the distribution of in( t, r, m-c) while the 'interfering events' with magnitude larger than m(l)6.0 have more influence. amr can be observed before the earthquake, albeit the pattern is complicated. the distribution of m ( t, r, m-c) in the (t, r, m-c) space shows two clusters of accelerating-like m. furthermore, when the spatial range is taken as a fixed circle centered at the epicenter of the main shock, m value is found to decrease gradually with the time window approaching the earthquake, implying the strengthening of amr behavior before the quake. spatio-temporal mapping of m value shows that the region with accelerating moment release correlates well with the source region, but such correlation depends on the sliding window selected. it turns out that amr does exist before the yutian earthquake, and such amr behavior may have physical relevance in the process of earthquake preparation. being only a retrospective case study, however, statistical significance of amr cannot be confirmed by the present result. moreover, constraint of failure time by amr analysis is shown to be difficult, at least for this case. |
| WOS关键词 | EDITORS INTRODUCTION ; GREAT EARTHQUAKES ; SEISMIC ACTIVITY ; ENERGY-RELEASE ; CRITICAL-POINT ; PREDICTION ; MODEL ; REGION ; CALIFORNIA ; EVENTS |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000265004300012 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2393779 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Jiang Chang-Sheng |
| 作者单位 | 1.China Earthquake Adm, Inst Geophys, Beijing 100081, Peoples R China 2.Chinese Acad Sci, Grad Univ, Lab Computat Geodynam, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang Chang-Sheng,Wu Zhong-Liang. Accelerating moment release (amr) before strong earthquakes: a retrospective case study of a controversial precursor[J]. Chinese journal of geophysics-chinese edition,2009,52(3):691-702. |
| APA | Jiang Chang-Sheng,&Wu Zhong-Liang.(2009).Accelerating moment release (amr) before strong earthquakes: a retrospective case study of a controversial precursor.Chinese journal of geophysics-chinese edition,52(3),691-702. |
| MLA | Jiang Chang-Sheng,et al."Accelerating moment release (amr) before strong earthquakes: a retrospective case study of a controversial precursor".Chinese journal of geophysics-chinese edition 52.3(2009):691-702. |
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来源：中国科学院大学
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