Figure F3. Seismicity along the Costa Rica margin with Expedition 344 site locations. Small black circles show seismicity recorded by Sismologica Nacional between 1992 and 2007. Focal mechanisms correspond to large earthquakes (Mw > 6.4) nucleated in the seismogenic zone over the past 25 y. Red circles show aftershocks from the 2002 Osa event, and beige circles show aftershocks from the 1999 Quepos event (modified from Arroyo et al., 2011). Triangles, squares, and diamonds show various seismic networks.
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