Are Aftershocks of Large Californian Earthquakes Diffusing?

Details Are Aftershocks of Large Californian Earthquakes Diffusing? Are Aftershocks of Large Californian Earthquakes Diffusing?

2003-03-19

arxiv.org/abs/physics/0303075v2

J. Geophys. Res., 108, 2483, 10.1029/2003JB002503, 2003

Physics

Geophysics

latex file of 34 pages, 15 postscript figures, minor revision. In press in J. Geophys. Res

Scientific paper

We analyze 21 aftershock sequences of California to test for evidence of space-time diffusion. Aftershock diffusion may result from stress diffusion and is also predicted by any mechanism of stress weakening. Here, we test an alternative mechanism to explain aftershock diffusion, based on multiple cascades of triggering. In order to characterize aftershock diffusion, we develop two methods, one based on a suitable time and space windowing, the other using a wavelet transform adapted to the removal of background seismicity. Both methods confirm that diffusion of seismic activity is very weak, much weaker than reported in previous studies. A possible mechanism explaining the weakness of observed diffusion is the effect of geometry, including the localization of aftershocks on a fractal fault network and the impact of extended rupture lengths which control the typical distances of interaction between earthquakes.

Affiliated with

Also associated with

No associations

Rating

Are Aftershocks of Large Californian Earthquakes Diffusing? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Are Aftershocks of Large Californian Earthquakes Diffusing?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Are Aftershocks of Large Californian Earthquakes Diffusing? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-205101