relation: https://episodesplatform.eu/eprints/1710/
title: Seismic imaging of a fluid storage in the actively extending Apennine mountain belt, southern Italy
creator: Amoroso, Ortensia
creator: Ascione, Alessandra
creator: Mazzoli, Stefano
creator: Virieux, Jean
creator: Zollo, Aldo
subject: Collective properties of seismicity
subject: Italy
description: A picture of the upper crustal structure of the Irpinia active faults system in southern Italy was obtained by combining new geological evidences, lithological properties, and microseismicity distribution. P and S wave velocity models indicate high VP/VS and low VP × VS values, suggesting fluid accumulation within a ~15 km wide rock volume where intense microseismicity is located. The 1980 Irpinia, Ms 6.9, earthquake nucleated within the same fault-bounded volume. We suggest that concentration of background seismicity is mainly controlled by high pore fluid pressure. Its increase in fluid-filled cracks around major faults leads to earthquakes' nucleation. Seismic pumping along major faults carries fluids through the conduit system represented by the intensely fractured damage zone. Conversely, the cross-fault barrier behaviour of the low-permeability fault core leads to pore fluid pressures building up within the fault-bounded block, thus producing a positive feedback triggering earthquake nucleation within the volume, which behaves as an “earthquake reservoir.”
publisher: American Geophysical Union
date: 2014-06
type: Article
type: NonPeerReviewed
identifier:   Amoroso, Ortensia and Ascione, Alessandra and Mazzoli, Stefano and Virieux, Jean and Zollo, Aldo  (2014) Seismic imaging of a fluid storage in the actively extending Apennine mountain belt, southern Italy.  Geophysical Research Letters, 41 (11).  pp. 3802-3809. DOI: https://doi.org/10.1002/2014GL060070 <https://doi.org/10.1002/2014GL060070>     
relation: http://doi.org/10.1002/2014GL060070
relation: doi:10.1002/2014GL060070