MAGNITUDE 7.6 EARTHQUAKE OCCURS OFFSHORE COSTA RICA September 5, 2012 Walter Hays, Global Alliance for Disaster Reduction, University of North Carolina, USA
CAUSE: INTERACTION OF THE COCOS, CARIBBEAN, AND SOUTH AMERICAN PLATES
The strong quake, which occurred at 10:42 a.m. EDT, was centered under the Nicoya Peninsula of Costa Rica, 140 km (87 miles) west of the capital, San Jose
Seismologists have been predicting a strong quake in that area for years
GOOD NEWS—BAD NEWS ABOUT THE LOCATION GOOD NEWS: The earthquake was deep [41 km, 25 mi]. BAD NEWS: The epicenter was 10km (6mi) northeast of Hojancha, Costa Rica and 140km (87mi) west of the capital city, San Jose
MORE GOOD NEWS: NO TSUNAMI A tsunami warning was issued immediately for the Pacific coast of Costa Rica, Panama, Nicaragua, El Salvador, Honduras, Mexico, Columbia, Ecuador, Guatemala and Peru, and lifted after a few hours.
THE BEST NEWS Damage, mortality, and morbidity were surprisingly light for two reasons: 1) the deep focal depth, and 2) the implementation of a modern building code with seismic provisions.
SOCIOECONOMIC IMPACTS Costa Rica's National Emergency Commission reported debris on roads, power outages and some structural damage in homes, especially on the Nicoya Peninsula
SOCIOECONOMIC IMPACTS (continued) Only one person died (a heart attack). Red Cross ambulances evacuated patients from two damaged hospitals.