Fluid flow and seismicity pattern: Evidence from the 1997 Umbria-Marche (central Italy) seismic sequence

被引：106

作者：

Antonioli, A ^{[1
]}

Piccinini, D ^{[1
]}

Chiaraluce, L ^{[1
]}

Cocco, M ^{[1
]}

机构：

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

来源：

GEOPHYSICAL RESEARCH LETTERS | 2005年 / 32卷 / 10期

关键词：

D O I：

10.1029/2004GL022256

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We model the spatial and temporal evolution of seismicity during the 1997 Umbria-Marche seismic sequence in terms of subsequent failures promoted by fluid flow. The diffusion process of pore-pressure relaxation is represented as a pressure perturbation generated by coseismic stress changes and propagating through a fluid saturated medium. The values of isotropic diffusivity range between 22 and 90 m(2)/s. The calculated value of anisotropic diffusivity (Daniso = 250 m(2)/s) is largest along the average strike (N140 degrees) direction of activated faults. Our results suggest that the observed spatio-temporal migration of seismicity is consistent with fluid flow.

引用

页码：1 / 4

页数：4

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