Stress magnitude estimates from earthquakes in oceanic plate interiors

摘要: We propose a method to estimate stress magnitudes in oceanic plate interiors from focal depths and mechanisms. Using depth-dependent rheology, we show it is possible the differential (σ1–σ3), averaged over some reference lithospheric thickness. The resolving power of investigated by evaluating effect uncertainties parameters that are involved analysis. apply Central Indian Ocean, where intraplate seismicity high. From well-studied earthquakes stresses order hundreds rnegapascals. This result consistent with high level was found numerical model calculations Cloetingh Wortel (1985, 1986). few events Pacific plate, also this area.