Regionalisation of seismic velocities for precise earthquake localisations in Kenya.

Abstract

The essential part of this study has involved the determination of seismic velocities for different regional waves using natural earthquake data. The analysis was based on available catalogues. The whole territory of Kenya was taken into consideration for the period 1964-1990. Travel time collected from 1964-1990 are based on the bulletins from the International ,2.eismological Centre (ISC) whose accuracy in localisations have been assumed to be better than the other reporting agencies for reasons mentioned in the text. The data from the catalogues have been used to compute velocities by least-square fit approach and correction of the Nairobi ML magnitudes has been done by correlating them to the mblSc magnitudes.