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| Titel |
Exploring aftershock properties with depth using Bayesian statistics |
| VerfasserIn |
Clement Narteau, Peter Shebalin, Matthias Holschneider |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250077533
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| Zusammenfassung |
| Stress magnitudes and frictional faulting properties vary with depth and may strongly affect
earthquake statistics. Nevertheless, if the Anderson faulting theory may be used to define the
relative stress magnitudes, it remains extremely difficult to observe significant variations of
earthquake properties from the top to the bottom of the seismogenic layer. Here, we
concentrate on aftershock sequences in normal, strike-slip and reverse faulting regimes to
isolate specific temporal properties of this major relaxation process with respect to depth.
More exactly, we use Bayesian statistics of the Modified Omori Law to characterize the
exponent p of the power-law aftershock decay rate and the duration c of the early stage
of aftershock activity that does not fit with this power-law regime. Preliminary
results show that the c-value decreases with depth without any significant variation
of the p-value. Then, we infer the duration of a non power-law aftershock decay
rate over short times can be related to the level of stress in the seismogenic crust. |
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