Estudio espacial del sismo (Mw=6.4) del 20 de noviembre del 2004 en Costa Rica

The Costa Rica seismic network OVSICORI-UNA located a Mw=6.4 (Harvard CMT) earthquake that occurred on November 20, 2004 at 08:07 UTC. The seismic event was located in the central Pacific part of Costa Rica with a focal depth of 25 km and about 100 km inland from the Middle America trench. The seismic event occurred in the deepest part of the crust, with aftershocks distributed to the surface. The seismic activity was relocated using a double difference technique and a prob- abilistic non-linear global search method. The local fault delineated by the seismic sequences is part of the fault system that delineates the boundary between the Ca- ribbean plate and Panama Block.