Fracture Energy and Aftershocks

摘要: Summary The b-value of the frequency-magnitude relationship for aftershocks increases with fracture energy yo mainshock according to empirical relationship, b = 0.06 log + 0.48 I', 0.53 where rc is correlation coefficient. Thus large yo, a fair proportion will have small magnitudes while converse true yo. Also, duration in days t,, over which M, 2 3 events occur equation, I, 0.55 - 2-41 0.92. San Fernando form pattern fresh fractures fall outside frictional ruptures. This not on western side numerous ruptures implying that this region boundary fault. could well be downstep fault plane left lateral strike slip motion (Whitcomb et al. Allen a!.). For local magnitude ML, radius R free parameter. good agreement results Randall,