| dc.description.abstract | The University of Nairobi has had a seismological network since 1963 as part of the
WorldWide Standardized Seismic Network (WWSSN). Later, in the 1990's, other
stations were installed in Kenya at different times. In this study, data from five digital
stations and one broadband station have been used for the period November 1999 to
December 2001. The performance of the stations has been checked and found to be
relatively good, yielding 3000 detected events for that period. After thorough analysis,
526 well-located events were selected of which 306,202 and 18 were local, regional and
teleseismic, events respectively. Data from the Eastern and Southern African Regional
Seismological Working Group (ESARSWG) have been used to constrain the locations.
Usually prompt event locations reports that have been provided previously during the
said period utilized single station data and are associated with high location errors,
because they do not take into account all the available data from the other remotely
located stations in the country. This study has synthesized all the available seismic data
for this period to generate more precise and constrained event locations.
Seismic patterns and trends, not realized before and not related to any known active faults
are revealed. Computed seismic energy maps and other results have been used to
characterize the subsurface and classify certain regions as possible earthquake risk zones.
The study classifies the regions into four zones according to the seismicity, geological,
and geographical settings. The four zones are the southern Kenya rifts, southeast Kenya,
Central rift and Mt Kenya regions | en |
