Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3210311a&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 10, CiteID L10311
Physics
18
Seismology: Earthquake Dynamics (1242), Physical Properties Of Rocks: Fracture And Flow, Seismology: Earthquake Source Observations (1240), Seismology: Theory, Structural Geology: Role Of Fluids
Scientific paper
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 m2/s. The calculated value of anisotropic diffusivity (Daniso = 250 m2/s) is largest along the average strike (N140°) direction of activated faults. Our results suggest that the observed spatio-temporal migration of seismicity is consistent with fluid flow.
Antonioli Andrea
Chiaraluce Lauro
Cocco Massimo
Piccinini Davide
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