Connotea
CiteULike
del.ico.us
BibSonomyAbstract
GEOPHYSICAL RESEARCH LETTERS,
VOL. 34,
L24305,
5 PP., 2007
doi:10.1029/2007GL031391
On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland
Department of Physics, University of Bologna, Bologna, Italy
Department of Physics, University of Bologna, Bologna, Italy
Department of Physics, University of Bologna, Bologna, Italy
Department of Natural Resources, University of Akureyri, Akureyri, Iceland
A model is proposed to explain the spatial distribution of foreshocks of the June 17th 2000, M s 6.6 earthquake in the South Iceland Seismic Zone (SISZ) and the high stress drop of the mainshock. Fluids of magmatic origin, ascending at near-lithostatic pressure through a low permeability layer perturb the regional stress field, inhibiting fluid flow laterally, where a high strength asperity is left. The asperity is modeled as elastic, embedded within a medium with low effective rigidity. Regional stresses due to tectonic motions are perturbed by the presence of the asperity, enhancing the production of hydrofractures and foreshocks in the NW and SE quadrants and increasing considerably the shear stress within the asperity, leading to the NS striking mainshock.
Received 20 July 2007; accepted 23 November 2007; published 22 December 2007.
Citation: (2007), On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland, Geophys. Res. Lett., 34, L24305, doi:10.1029/2007GL031391.
Cited By