Mother Nature provided a sharp wake-up call for residents along the border with Panamá Sunday,
An earthquake estimated at 5.2 to 5.3 magnitude took place at 5:38 a.m. The estimated epicenter was reported to be in the vicinity of Ciudad Neily in Corredores.
Then at 6:20 a.m. A 4.3-=magnitude aftershock took place in the same area, according to both the Observatorio Vulcanológico y Sismológico de Costa Rica at the Universidad Nacional in Heredia and the Laboratorio de Ingeniería Sísmica at the Universidad de Costa Rica.
The cause of the quake was reported as the subduction of the Cocos tectonic plate under the lighter Caribbean plate. That is the usual cause on the Pacific coast.
The first quake also was felt by some in the Central Valley.