EXTRACTION OF SPATIO-TEMPORAL SLIP VELOCITY FUNCTIONOF EARTHQUAKE FROM THE EXISTINGSOURCE INVERSION MODEL

摘要

The slip velocity function is one of the key factors controlling the radiation of seismic waves. We proposea technique for extracting a spatio-temporal slip velocity function from source time functions obtained bythe existing conventional source inversion results. We also demonstrate the feasibility of this method withapplication to the inverted source models of the 26-March-1997 Northwestern Kagoshima earthquake(MW6.1) in Japan from teleseismic data and strong-motion data, respectively. The slip velocity functionextracted from the strong-motion inversion model has a higher resolution both in space and timecompared to that from the teleseismic inversion model. The maximum peak velocity in the asperity areafor both models are comparable to those for the 1995 Kobe earthquake estimated by previous studies.