by E. Lippiello, F. Giacco, W. Marzocchi, C. Godano, L. de Arcangelis
Abstract:
Aftershocks are the most striking evidence of earthquake interactions and the physical mechanisms at the origin of their occurrence are still intensively debated. Novel insights stem from recent results on the influence of the faulting style on the aftershock organisation in magnitude and time. Our study shows that the size of the aftershock zone depends on the fault geometry. We find that positive correlations among parameters controlling aftershock occurrence in time, energy and space are a stable feature of seismicity independently of magnitude range and geographic areas. We explain the ensemble of experimental findings by means of a description of the Earth Crust as an heterogeneous elastic medium coupled with a Maxwell viscoelastic asthenosphere. Our results show that heterogeneous stress distribution in an elastic layer combined with a coupling to a viscous flow are sufficient ingredients to describe the physics of aftershock triggering.
Reference:
Mechanical origin of aftershocks (E. Lippiello, F. Giacco, W. Marzocchi, C. Godano, L. de Arcangelis), In OPEN ACCESS SCIENTIFIC REPORTS, volume 5, 2015. (Articolo in rivista)
Bibtex Entry:
@article{lip15,
author = {E. Lippiello, and F. Giacco, and W. Marzocchi, and C. Godano, and L. de Arcangelis,},
pages = {1-7},
title = {Mechanical origin of aftershocks},
volume = {5},
note = {Articolo in rivista},
issn = {2332-2675},
journal = {OPEN ACCESS SCIENTIFIC REPORTS},
doi = {10.1038/srep15560},
year = {2015},
wosId = {WOS:000363397100001},
scopusId = {2-s2.0-84945328658},
abstract = {Aftershocks are the most striking evidence of earthquake interactions and the physical mechanisms
at the origin of their occurrence are still intensively debated. Novel insights stem from recent
results on the influence of the faulting style on the aftershock organisation in magnitude and time.
Our study shows that the size of the aftershock zone depends on the fault geometry. We find that
positive correlations among parameters controlling aftershock occurrence in time, energy and space
are a stable feature of seismicity independently of magnitude range and geographic areas. We
explain the ensemble of experimental findings by means of a description of the Earth Crust as an
heterogeneous elastic medium coupled with a Maxwell viscoelastic asthenosphere. Our results show
that heterogeneous stress distribution in an elastic layer combined with a coupling to a viscous flow
are sufficient ingredients to describe the physics of aftershock triggering.}
}