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首页> 外文期刊>Geosciences >Mainshock Anticipated by Intra-Sequence Ground Deformations: Insights from Multiscale Field and SAR Interferometric Measurements
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Mainshock Anticipated by Intra-Sequence Ground Deformations: Insights from Multiscale Field and SAR Interferometric Measurements

机译：序列内部变形预期的主震：多尺度场和SAR干涉测量测量的见解

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摘要

The 2016 Central Italy seismic sequence was characterized by two main events: 24 August, Mw 6, and 30 October, Mw 6.5. We carried out high-resolution field sampling and DInSAR analysis of the coseismic and intra-sequence ground deformations along the Mt Vettore-Mt Bove causative fault (VBF). We found that during the intra-sequence period (24 August–30 October), the ground experienced some deformations whose final patterns seemed to be retraced and amplified by the following mainshock. We interpreted that (i) immediately after the 24 August earthquake, the deformation observed in the southern VBF expanded northwards and westwards over a Length of Deforming Ground (LDG) ranging between 28.7 and 36.3 km, and (ii) it extended to the whole portion of the hanging wall that was later affected by mainshock coseismic deformation. Assuming the LDG to be an indicator for an expected (=coseismic) surface rupture length and using known scaling functions, we obtained 6.4 ≤ Mw ≤ 6.7 for a possible incoming earthquake, which is consistent with the mainshock magnitude. We suggest that the evolution of the ground deformations after a significant seismic event might provide insights on the occurrence of new earthquakes with magnitudes comparable to or larger than the former.
机译：2016年中部意大利地震序列的特点是两个主要活动：8月24日，MW 6和10月30日，MW 6.5。我们沿着MT Vettore-MT叶片造成故障（VBF）进行了高分辨率的野外采样和逐次晶体地变形的探测器分析。我们发现，在序列期间（10月24日至30日），地面经历了一些变形，其最终模式似乎被以下主轴重新定位和放大。我们解释了（i）在8月24日地震之后立即，南部VBF中观察到的变形在28.7和36.3公里之间的变形地面（LDG）的长度上扩展了向北和向西，并延伸到整个部分后来受到主震动电影变形影响的悬挂墙。假设LDG是预期的（=电动发电机）表面破裂长度和使用已知的缩放功能的指示器，我们获得了可能的入口地震的6.4≤mw≤6.7，这与主轴幅度一致。我们建议在重大地震事件发生后的地面变形的演变可能会对新地震发生的见解，其幅度与前者更大或大。

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