The 2009 L'Aquila (central Italy) MW6.3 earthquake: Main shock and aftershocks

被引：318

作者：

Chiarabba, C. ^{[1
]}

Amato, A. ^{[1
]}

Anselmi, M. ^{[1
]}

Baccheschi, P. ^{[1
]}

Bianchi, I. ^{[1
]}

Cattaneo, M. ^{[1
]}

Cecere, G. ^{[1
]}

Chiaraluce, L. ^{[1
]}

Ciaccio, M. G. ^{[1
]}

De Gori, P. ^{[1
]}

De Luca, G. ^{[1
]}

Di Bona, M. ^{[1
]}

Di Stefano, R. ^{[1
]}

Faenza, L. ^{[1
]}

Govoni, A. ^{[1
]}

Improta, L. ^{[1
]}

Lucente, F. P. ^{[1
]}

Marchetti, A. ^{[1
]}

Margheriti, L. ^{[1
]}

Mele, F. ^{[1
]}

Michelini, A. ^{[1
]}

Monachesi, G. ^{[1
]}

Moretti, M. ^{[1
]}

Pastori, M. ^{[1
]}

Agostinetti, N. Piana ^{[1
]}

Piccinini, D. ^{[1
]}

Roselli, P. ^{[1
]}

Seccia, D. ^{[1
]}

Valoroso, L. ^{[1
]}

机构：

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

来源：

GEOPHYSICAL RESEARCH LETTERS | 2009年 / 36卷

关键词：

CENTRAL APENNINES; LAZIO-ABRUZZO; FAULT; SEISMICITY; SEQUENCE; RATES;

D O I：

10.1029/2009GL039627

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A M-W 6.3 earthquake struck on April 6, 2009 the Abruzzi region (central Italy) producing vast damage in the L'Aquila town and surroundings. In this paper we present the location and geometry of the fault system as obtained by the analysis of main shock and aftershocks recorded by permanent and temporary networks. The distribution of aftershocks, 712 selected events with M-L >= 2.3 and 20 with M-L >= 4.0, defines a complex, 40 km long, NW trending extensional structure. The main shock fault segment extends for 15-18 km and dips at 45 degrees to the SW, between 10 and 2 km depth. The extent of aftershocks coincides with the surface trace of the Paganica fault, a poorly known normal fault that, after the event, has been quoted to accommodate the extension of the area. We observe a migration of seismicity to the north on an echelon fault that can rupture in future large earthquakes. Citation: Chiarabba, C., et al. (2009), The 2009 L'Aquila (central Italy) M(W)6.3 earthquake: Main shock and aftershocks, Geophys. Res. Lett., 36, L18308, doi: 10.1029/2009GL039627.

引用

页数：6

共 25 条

[1] Effect of Time Dependence on Probabilistic Seismic-Hazard Maps and Deaggregation for the Central Apennines, Italy [J].