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DOI | 10.1029/2018GL080904 |
The 19 September 2017 (M(w)7.1) Intermediate-Depth Mexican Earthquake: A Slow and Energetically Inefficient Deadly Shock | |
Mirwald, Aron1; Cruz-Atienza, Victor M.1; Diaz-Mojica, John1; Iglesias, Arturo1; Singh, Shri K.1; Villafuerte, Carlos1; Tago, Josue2 | |
2019-02-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:4页码:2054-2064 |
文章类型 | Article |
语种 | 英语 |
国家 | Mexico |
英文摘要 | We investigate dynamic source parameters of the M(w)7.1 Puebla-Morelos intermediate-depth earthquake (h = 57 km) of 19 September 2017, which devastated Mexico City. Our simple, elliptical source model, coupled with a new Particle Swarm Optimization algorithm, revealed rupture propagation within the subducted Cocos plate, featuring a high stress drop (Delta tau = 14.9 +/- 5.6 MPa) and a remarkably low radiation efficiency (eta(r) = 0.16 +/- 0.09). Fracture energy was large (G = (1.04 +/- 0.3) x 10(16) J), producing a slow dissipative rupture (V-r/V-s = 0.34 +/- 0.04) with scaling-consistent radiated energy (E-r = (1.8 +/- 0.9).10(15) J) and energy-moment ratio (E-r/M-0 = 3.2 x 10(-5)). About 84% of the available potential energy for the dynamic rupture was dissipated in the focal region, likely producing friction-induced melts in the fault core of 0.2-1.2 cm width due to heat production (700-1200 degrees C temperature rise). Such source features seem to be a universal signature of intermediate-depth earthquakes. |
英文关键词 | 19 September 2017 Puebla-Morelos Mexican earthquake dynamic source inversion Particle Swarm Optimization method slow and highly dissipative rupture process friction-induced melts in fault core large strong motions in Mexico City |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000461855600018 |
WOS关键词 | RADIATED SEISMIC ENERGY ; RUPTURE ; PERIDOTITE ; INVERSION ; ZONE ; DEEP ; PARAMETERS ; RELEASE ; PLATE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/25904 |
专题 | 气候变化 |
作者单位 | 1.Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City, DF, Mexico; 2.Univ Nacl Autonoma Mexico, Fac Ingn, Mexico City, DF, Mexico |
推荐引用方式 GB/T 7714 | Mirwald, Aron,Cruz-Atienza, Victor M.,Diaz-Mojica, John,et al. The 19 September 2017 (M(w)7.1) Intermediate-Depth Mexican Earthquake: A Slow and Energetically Inefficient Deadly Shock[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(4):2054-2064. |
APA | Mirwald, Aron.,Cruz-Atienza, Victor M..,Diaz-Mojica, John.,Iglesias, Arturo.,Singh, Shri K..,...&Tago, Josue.(2019).The 19 September 2017 (M(w)7.1) Intermediate-Depth Mexican Earthquake: A Slow and Energetically Inefficient Deadly Shock.GEOPHYSICAL RESEARCH LETTERS,46(4),2054-2064. |
MLA | Mirwald, Aron,et al."The 19 September 2017 (M(w)7.1) Intermediate-Depth Mexican Earthquake: A Slow and Energetically Inefficient Deadly Shock".GEOPHYSICAL RESEARCH LETTERS 46.4(2019):2054-2064. |
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