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DOI | 10.1029/2018GL077485 |
Faults Geometry and the Role of Fluids in the 2016-2017 Central Italy Seismic Sequence | |
Chiarabba, C.1; De Gori, P.1; Cattaneo, M.1; Spallarossa, D.2; Segou, M.3 | |
2018-07-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:14页码:6963-6971 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; England |
英文摘要 | The 2016-2017 Central Italy seismic sequence ruptured overlapping normal faults of the Apennines mountain chain, in nine earthquakes with magnitude Mw > 5 within a few months. Here we investigate the structure of the fault system using an extensive aftershock data set, from joint permanent and temporary seismic networks, and 3-D Vp and Vp/Vs velocity models. We show that mainshocks nucleated on gently west dipping planes that we interpret as inverted steep ramps inherited from the late Pliocene compression. The two large shocks, the 24 August, Mw = 6.0 Amatrice and the 30 October, Mw = 6.5 Norcia occurred on distinct faults reactivated by high pore pressure at the footwall, as indicated by positive Vp/Vs anomalies. The lateral extent of the overpressurized volume includes the fault patch of the Norcia earthquake. The irregular geometry of normal faults together with the reactivated ramps leads to the kinematic complexity observed during the coseismic ruptures and the spatial distribution of aftershocks. |
英文关键词 | normal faulting earthquakes crustal structure fluids and earthquakes aftershock sequences faulting mechanisms |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442582100024 |
WOS关键词 | 30 OCTOBER 2016 ; EARTHQUAKE SEQUENCE ; CENTRAL APENNINES ; UMBRIA-MARCHE ; NORTHERN APENNINES ; RSNI-PICKER ; MAIN SHOCKS ; COMPLEX ; TECTONICS ; WAVE |
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/28508 |
专题 | 气候变化 |
作者单位 | 1.Ist Nazl Geofis & Vulcanol, Rome, Italy; 2.Univ Genoa, DIPTERIS, Genoa, Italy; 3.British Geol Survey, Nottingham, England |
推荐引用方式 GB/T 7714 | Chiarabba, C.,De Gori, P.,Cattaneo, M.,et al. Faults Geometry and the Role of Fluids in the 2016-2017 Central Italy Seismic Sequence[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(14):6963-6971. |
APA | Chiarabba, C.,De Gori, P.,Cattaneo, M.,Spallarossa, D.,&Segou, M..(2018).Faults Geometry and the Role of Fluids in the 2016-2017 Central Italy Seismic Sequence.GEOPHYSICAL RESEARCH LETTERS,45(14),6963-6971. |
MLA | Chiarabba, C.,et al."Faults Geometry and the Role of Fluids in the 2016-2017 Central Italy Seismic Sequence".GEOPHYSICAL RESEARCH LETTERS 45.14(2018):6963-6971. |
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