TY  - JOUR
ID  - epos1504
UR  - http://dx.doi.org/10.1029/1999GL900394
IS  - 13
A1  - Sornette, Anne
A1  - Sornette, Didier
Y1  - 1999/07/01/
N2  - Assume that each earthquake can produce a series of aftershock independently of its size according to its ?local? Omori's law with exponent 1 + ?. Each aftershock can itself trigger other aftershocks and so on. The global observable Omori's law is found to have two distinct power law regimes, the first one with exponent p? = 1-? for time t < t* ? ?^(?1/?), where 0 < 1 ? ? < 1 measures the fraction of triggered earthquakes per triggering earthquake, and the second one with exponent p+ = 1 + ? for larger times. The existence of these two regimes rationalizes the observation of Kisslinger and Jones [1991] that the exponent p seems positively correlated to the surface heat flow: a higher heat flow is a signature of a higher crustal temperature, which leads to larger strain relaxation by creep, corresponding to fewer events triggered per earthquake, i.e. to a larger ?, and thus to a smaller t*, leading to an effective measured exponent more heavily weighted toward p+ > 1.
PB  - American Geophysical Union
JF  - Geophysical Research Letters
VL  - 26
SN  - 0094-8276
TI  - Renormalization of earthquake aftershocks
SP  - 1981
AV  - none
EP  - 1984
ER  -