Insights into earthquake source physics from high-frequency ... - IRIS

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Bimaterial ruptures with slip- and velocity-dependent friction and stress heterogeneities (Ampuero and Ben-Zion, GJI 2008) ! slip-weakening velocity-weakening " The dynamic changes of , produce asymmetric crack-tip fields Cases leading to pulses have pronounced macroscopic asymmetry
The results are robust with respect to stress heterogeneities (and also proxy for off-fault yielding) Bimaterial ruptures are likely to have •Strong directivity •Strong reduction of , at crack tip (and hence large amount of <strong>high</strong> <strong>frequency</strong> radiation)
Page 1 and 2: Insights into earthquake source phy
Page 3 and 4: Basic relations Total strain has el
Page 5 and 6: Order of magnitude estimates of con
Page 7 and 8: Conclusions I • The ratio of radi
Page 9 and 10: Can be relevant to numerous importa
Page 11 and 12: Wrinkle-like rupture pulse complian
Page 13 and 14: Estimates of slip velocities (Ben-Z
Page 15 and 16: Slip-weakening friction (Shi and Be
Page 17: Simulations with imposed super-shea
Page 21 and 22: Relations to field observations? Ne
Page 23 and 24: Damage generation for different dep
Page 25 and 26: com. fracture length (cm) 60 50 40
Page 27 and 28: Scott et al. (1994) Shapiro et al.
Page 29 and 30: Pulverized rocks in the Mojave sect
Page 31 and 32: Asymmetric dynamic earthquake trigg
Page 33: Conclusions II • Ruptures along a

Insights into earthquake source physics from high-frequency ... - IRIS

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