Extension of Geiger’s method for earthquake hypocentre location

(in Croatian)

Abstract

The method of L. Geiger for earthquake hypocentre location, based on the knowledge of seismic wave arrival times, is well discussed in seismological literature and widely used. In this paper a simple extension of the method is suggested. It is shown that the error equations could be formed from the arrival time differences of the earthquake phases. In that way it has become possible to include, in the determination of the hypocentre, the data from the stations with poor timing system, as well as data from the strong motion records which usually operate without the absolute time system. Also, due to the lack of accurate timing, it was often impossible to locate instrumentally earthquakes from the beginning of this century. The presented method is very convenient for relocation of those events.