After the 6.9 earthquake that occurred on Sunday night on the coasts of the Central Pacific, the Volcanological and Seismological Observatory of Costa Rica (OVSICORI) reported at least 300 aftershocks.
The main tremor occurred at 8:28 p.m., with an epicenter 23 kilometers southwest of Jacó, in the canton of Garabito. However, hours later, multiple aftershocks followed. The most intense of them reached 5.1 degrees at 8:32 p.m.
Another report provided by the National Seismological Network (RSN) indicated that the earthquake occurred from the process of subduction of the Coco plate under the Caribbean plate.
The main earthquake and its aftershocks occur in one of the most seismically active areas in the country.
Historically, earthquakes with magnitudes of 7.0 have occurred here, such as the Cóbano earthquake on March 25th, 1990. Other relevant earthquakes in nearby areas were the Quepos earthquake in August 1999 (6.9) and the Osa earthquake in June 2002 (6.4).
The most recent aftershock was reported at 1:00 p.m. on Monday, with a magnitude of 3.9 degrees and an epicenter 20 kilometers south of Jacó.