Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3446
AuthorsAntonioli, A.* 
Piccinini, D.* 
Chiaraluce, L.* 
Cocco, M.* 
TitleFluid flow and seismicity pattern: Evidence from the 1997 Umbria-Marche (central Italy) seismic sequence
Issue Date26-May-2005
Series/Report no./32 (2005)
DOI10.1029/2004GL022256
URIhttp://hdl.handle.net/2122/3446
KeywordsDiffusivity
fluid flow
Umbria-Marce
normal fautling
Subject Classification04. Solid Earth::04.06. Seismology::04.06.01. Earthquake faults: properties and evolution 
AbstractWe 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 /s. The calculated value of anisotropic diffusivity (Daniso = 250 m /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.
Appears in Collections:Papers Published / Papers in press

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