by LIPPIELLO Eugenio, GODANO Cataldo, DE ARCANGELIS Lucilla
Abstract:
An important issue for earthquake prediction is the dependence of the earthquake magnitude from past seismicity. Recently, clustering in magnitude has been evidenced: earth- quakes occur with higher probability close in time, space, and magnitude to previous events. An open question is if this magnitude correlations can be found in simple models for earthquakes. Here we show that the Olami-Feder-Christensen model generates synthetic catalogs which exhibit cor- relations between occurrence times and magnitudes of subsequent events similar to those observed in experimental catalogs. These correlations are observed only in the range of parameters where the magnitude distribution of synthetic catalogs agrees with the experimental one. The similarity of the functional form of magnitude correlations with experimental data and their dependence on temporal distances confirm that correlations found in real catalogs cannot be attributed to spurious effects related to magnitude incompleteness.
Reference:
Magnitude correlations in the Olami-Feder-Christensen model (LIPPIELLO Eugenio, GODANO Cataldo, DE ARCANGELIS Lucilla), In EUROPHYSICS LETTERS, volume 102, 2013. (Articolo in rivista)
Bibtex Entry:
@article{lip13,
author = {LIPPIELLO Eugenio, and GODANO Cataldo, and DE ARCANGELIS Lucilla,},
pages = {1-6},
title = {Magnitude correlations in the Olami-Feder-Christensen model},
volume = {102},
note = {Articolo in rivista},
issn = {0295-5075},
journal = {EUROPHYSICS LETTERS},
doi = {10.1209/0295-5075/102/59002},
year = {2013},
wosId = {WOS:000321122600035},
scopusId = {2-s2.0-84880560292},
abstract = {An important issue for earthquake prediction is the dependence of the earthquake
magnitude from past seismicity. Recently, clustering in magnitude has been evidenced: earth-
quakes occur with higher probability close in time, space, and magnitude to previous events. An
open question is if this magnitude correlations can be found in simple models for earthquakes. Here
we show that the Olami-Feder-Christensen model generates synthetic catalogs which exhibit cor-
relations between occurrence times and magnitudes of subsequent events similar to those observed
in experimental catalogs. These correlations are observed only in the range of parameters where
the magnitude distribution of synthetic catalogs agrees with the experimental one. The similarity
of the functional form of magnitude correlations with experimental data and their dependence
on temporal distances confirm that correlations found in real catalogs cannot be attributed to
spurious effects related to magnitude incompleteness.}
}