2009年03月05日

Earthquaks : the endgame

Once on Earthquake has been initiated the question arises, where will it end ? Hou big an earthque will it be? Analysis of the mapped surface rupture trances of 22 historical strike-slip earthquaks, the first at San Andreas, California in 1857 and the moust reccent at Denali, Alaska in 2002, Shows that rupture endpoints frequenty coincide with fault steps or the termini of active fault traces, and that a fault step of more than 3 or 4 km effectively stops an earthquake rupture in tracks.

These findings are relevant to seismic hazard analysis by suggesting limits on the probable extent of future earthquaks on known active faults.


### DataBace ###
nature Vol.444 243-400 Issue no.7117 16 November 2007
News and Views p.276 / SEISMOLOGY : Greatness Thrust upon then / James F. Doldan
Letter p.358 / Predicting the endpoints of earthquake rupturs / Steven G. Wesnousky (University of Nevada)

The latest research seems to imply that all earthquakes are born equal. but comblining that insight with earlier, seemingly condradictory, work could help us to tell which tremors grow to become more equel than others.
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