G.V. Nana1 , S. Nguiya2 , A. Tokam1
1University of Yaounde I
2University of Douala
Abstract:
Earthquakes frequently occur along the Cameroon Volcanic Line (CVL), with magnitudes ranging between 2 and 6. These events are from tectonics and volcanic origins. An experiment called the Cameroon Broadband Seismic Experiment (CBSE) was conducted in the country between 2005 and 2007. The data collected was used in this work to computed the seismic hazard and therefore highlight the most risky areas around the CVL. We applied a pass band filter on to the data with frequency ranging from 1 to 5 Hz. We then picked the first P and S arrivals. This allowed the location of the earthquakes.The located events were distributed along the Congo Craton margin. This provided an update of the Cameroon neoseismicity. From the seismicity map and seismic hazard computation, we distinguished four risky areas: The mount Cameroon area, considered to be the most seismically active; the southern Cameroon area's seismicity is associated with the Kribi-Campo fault and also the presence of the Congo Craton, known for its high magnitude tectonic activity. The area along the Sanaga fault is the third risk zone; and the last one is the western Cameroon characterized by a network of large faults.
