Coseismic deformation of the destructive April 6, 2009 L'Aquila earthquake (central Italy) from GPS data

被引：157

作者：

Anzidei, M. ^{[1
]}

Boschi, E. ^{[1
]}

Cannelli, V. ^{[1
]}

Devoti, R. ^{[1
]}

Esposito, A. ^{[1
]}

Galvani, A. ^{[1
]}

Melini, D. ^{[1
]}

Pietrantonio, G. ^{[1
]}

Riguzzi, F. ^{[1
]}

Sepe, V. ^{[1
]}

Serpelloni, E. ^{[1
]}

机构：

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

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

关键词：

1997; UMBRIA-MARCHE; CENTRAL APENNINES; STRAIN; VELOCITY; FIELDS; RATES;

D O I：

10.1029/2009GL039145

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

On April 6, 2009, 01: 32: 39 GMT, the city of L'Aquila was struck by a Mw 6.3 earthquake that killed 307 people, causing severe destruction and ground cracks in a wide area around the epicenter. Four days before the main shock we augmented the existing permanent GPS network with five GPS stations of the Central Apennine Geodetic Network (CaGeoNet) bordering the L'Aquila basin. The maximum horizontal and vertical coseismic surface displacements detected at these stations was 10.39 +/- 0.45 cm and -15.64 +/- 1.55 cm, respectively. Fixing the strike direction according to focal mechanism estimates, we estimated the source geometry with a non linear inversion of the geodetic data. Our best fitting fault model is a 13 x 15.7 km(2) rectangular fault, SW-dipping at 55.3 +/- 1.8 degrees, consistent with the position of observed surface ruptures. The estimated slip (495 +/- 29 mm) corresponds to a 6.3 moment magnitude, in excellent agreement with seismological data. Citation: Anzidei, M., et al. (2009), Coseismic deformation of the destructive April 6, 2009 L'Aquila earthquake (central Italy) from GPS data, Geophys. Res. Lett., 36, L17307, doi:10.1029/2009GL039145.

引用

页数：5

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