The 1997 Umbria-Marche (Italy) earthquake sequence: relationship between ground deformation and seismogenic structure

被引：53

作者：

Cinti, FR ^{[1
]}

Cucci, L ^{[1
]}

Marra, F ^{[1
]}

Montone, P ^{[1
]}

机构：

[1] Ist Nazl Geofis, I-00143 Rome, Italy

来源：

GEOPHYSICAL RESEARCH LETTERS | 1999年 / 26卷 / 07期

关键词：

D O I：

10.1029/1999GL900142

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A field survey performed during, the 1997 Umbria-Marche earthquake sequence led us to recognize ground and pavement ruptures associated with the three largest shocks (Mw greater than or equal to 5.7). The ruptures are concentrated in narrow bands that, in part, are on and near previously mapped high-angle normal faults. The geometry of the ground deformation is consistent with the NE-trending extension indicated by CMT focal solutions of the mainshocks. The distribution of aftershocks suggests that the three mainshocks occurred on similar to 40 degrees SW-dipping normal faults. Geological investigations, modelling of expected coseismic elevation changes, and seismic data, suggest that the surface deformation is not the direct result of primary rupture of faults at depth.

引用

页码：895 / 898

页数：4

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