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| Titel |
Recurrent frequency-size distribution of characteristic events |
| VerfasserIn |
S. G. Abaimov, K. F. Tiampo, D. L. Turcotte, J. B. Rundle |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 16, no. 2 ; Nr. 16, no. 2 (2009-04-28), S.333-350 |
| Datensatznummer |
250013144
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| Publikation (Nr.) |
 copernicus.org/npg-16-333-2009.pdf |
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| Zusammenfassung |
| Statistical frequency-size (frequency-magnitude)
properties of earthquake occurrence play an important role in seismic hazard
assessments. The behavior of earthquakes is represented by two different
statistics: interoccurrent behavior in a region and recurrent behavior at a
given point on a fault (or at a given fault). The interoccurrent
frequency-size behavior has been investigated by many authors and generally
obeys the power-law Gutenberg-Richter distribution to a good approximation.
It is expected that the recurrent frequency-size behavior should obey
different statistics. However, this problem has received little attention
because historic earthquake sequences do not contain enough events to
reconstruct the necessary statistics. To overcome this lack of data, this
paper investigates the recurrent frequency-size behavior for several
problems. First, the sequences of creep events on a creeping section of the
San Andreas fault are investigated. The applicability of the Brownian
passage-time, lognormal, and Weibull distributions to the recurrent
frequency-size statistics of slip events is tested and the Weibull
distribution is found to be the best-fit distribution. To verify this result
the behaviors of numerical slider-block and sand-pile models are
investigated and the Weibull distribution is confirmed as the applicable
distribution for these models as well. Exponents β of the best-fit Weibull
distributions for the observed creep event sequences and for the
slider-block model are found to have similar values ranging from 1.6 to 2.2
with the corresponding aperiodicities CV of the applied distribution
ranging from 0.47 to 0.64. We also note similarities between recurrent
time-interval statistics and recurrent frequency-size statistics. |
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