Recent seismicity of Central High Atlas and Ouarzazate basin (Morocco)

The paper describes the tectonic evolution of the Central High Atlas and the Ouarzazate basin in Morocco, noting that many of the tectonic phenomena follow the previous structural lines. Although the area is one of relatively low seismicity, its location in an intra plate part of the African Plate and its high morphology, the effects of an earthquake could be considerable. This study combines seismic records from 1900 to 2007 with the integration of existing tectonic and structural information to better define the seismogenic zones. A newly identified cluster of epicenters in a NNW-SSE linear zone may be related to the Imilchil fault, where the earthquakes with magnitudes of 4–5 at depths of 5–20 km have been identified. Recent work in the Ouarzazate basin indicated that the Amekchoud fault ramp could generate seismic events with magnitudes as large as 6.4 Mw.