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| Titel |
Triggering cascades and statistical properties of aftershocks |
| VerfasserIn |
M. Baiesi, J. Davidsen, C. Gu |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250060408
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| Zusammenfassung |
| With a general statistical procedure for identifying aftershocks, we investigate their statistics
for a high-resolution earthquake catalog covering Southern California. By comparing our
results with those from other definitions of aftershocks, we discover that many features
depend on how one defines aftershocks. The differences in the results include the temporal
variation in the rate of aftershocks and the spatial distribution of aftershocks at large
distances. We also discuss why the mean aftershock distance is not a good descriptor of the
seismic process. Nevertheless, other features are robust, suggesting that they truly
characterize aftershock sequences. These include the p-values in the Omori-Utsu law for
large main shocks, Båth’s law, the productivity law with an exponent smaller than the b-value
in the Gutenberg-Richter law, and the identification of the most likely distance of aftershocks
from the main shock with the rupture length. Moreover, we find that the exponent p
in the Omori-Utsu law does not vary significantly with main shock magnitude. |
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