Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079617 |
Seismic Evidence of an Early Afterslip During the 2012 sequence in Emilia (Italy) | |
Sugan, M.1; Vuan, A.1; Kato, A.2; Massa, M.3; Amati, G.4 | |
2019-01-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:2页码:625-635 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; Japan |
英文摘要 | We apply a matched-filter-technique to augment the detected events in the time window between the two mainshocks of the 2012 Emilia seismic sequence (Italy), 20 (M-w 6.1) and 29 (M-w 6.0) May. Using well-located templates, we increase the number of detections from 1,727 to 7,616. This greater detail allows evidencing migrations of seismic events from the nucleation point of the first shock to the second. Repeating earthquakes are also found between the two mainshocks. The seismicity pattern suggests a transient slip acting immediately after the shallow first event, weakening and loading the volume around the deep nucleation point of the 29 May M-w 6.0 earthquake. We interpret migrations and repeaters as the fingerprint of an early afterslip triggered by the first mainshock. By taking into account the earliest repeater we estimate a cumulative slip of approximately 27 cm (M-w 5.7). This value could represent the lower bound of the total released afterslip. Plain Language Summary To improve our understanding of interactions between subsequent mainshocks, we investigated the spatiotemporal evolution of the seismicity for the 2012 Emilia seismic sequence (Italy) in the time window from 20 to 29 May 2012. We use a technique based on waveform matching to augment the detected earthquakes. From the new catalog, we observe along-strike and at depth seismic migrations consistent with a phase of rapid postseismic slip concentrated near the base of the seismogenic zone immediately after the first main shock. We suggest that the afterslip contributed to loading the fault rupture area of the 29 May M-w 6.0 earthquake. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000458607400012 |
WOS关键词 | 6.3 LAQUILA EARTHQUAKE ; M-W ; CHI-CHI ; AFTERSHOCKS ; SLIP ; DRIVEN ; DEFORMATION ; MIGRATION ; CRUST ; APENNINES |
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/26937 |
专题 | 气候变化 |
作者单位 | 1.Ist Nazl Oceanog & Geofis Sperimentale OGS, Ctr Ric Sismol, Trieste, Italy; 2.Univ Tokyo, Earthquake Res Inst, Tokyo, Japan; 3.Ist Nazl Geofis & Vulcanol, Milan, Italy; 4.CINECA, Consorzio Interuniv Calcolo Automat, Rome, Italy |
推荐引用方式 GB/T 7714 | Sugan, M.,Vuan, A.,Kato, A.,et al. Seismic Evidence of an Early Afterslip During the 2012 sequence in Emilia (Italy)[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(2):625-635. |
APA | Sugan, M.,Vuan, A.,Kato, A.,Massa, M.,&Amati, G..(2019).Seismic Evidence of an Early Afterslip During the 2012 sequence in Emilia (Italy).GEOPHYSICAL RESEARCH LETTERS,46(2),625-635. |
MLA | Sugan, M.,et al."Seismic Evidence of an Early Afterslip During the 2012 sequence in Emilia (Italy)".GEOPHYSICAL RESEARCH LETTERS 46.2(2019):625-635. |
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