A preliminary earthquake location method based on a hyperbolic approximation to travel times


We present a fast, two-step method for preliminary earthquake location using the direct arrivals recorded by a local network by assuming that travel times follow a hyperbolic relationship. Testing with synthetic data shows that the method performs better than might have been expected given the approximations involved. The determination of epicentral locations is very robust even in the presence of noise. When the events are under or near the network and only P arrivals are used, the epicenters are mislocated by a few kilometers at most. When S arrivals are included, depths and origin times are also reliably estimated. -from Authors

Publication Title

Bulletin - Seismological Society of America

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