The epicenter was estimated to be in the Pacific south of Panamá. The Red Sismológica Nacional said the quake had a 5.7 magnitude. The U.S. Earthquake Information Center estimated it at 6.2. Specifically the center said the epicenter was (346 kilometers or 214 miles) south of David, Panamá.
There was no immediate report of serious damage.
The location suggests that the quake was related to the large system of faults that are in the Panamá fractura zone, said the Red Sismológica Nacional. This is in the border between the Coco and Nazca tectonic plates. This is the most active region in Central America, it said.
The Red also estimated the epicenter to be 130 kilometers or about 81 miles south southwest of Puerto Jiménez on the Osa peninsula.
The Laboratorio de Ingeniería Sísmica at the Universidad de Costa Rica said that 13 of its stations reported a strong quake. The Laboratorio noted that each quake behaves differently. In this case, the quake appears to have been felt strongest in the center of the country. The Laboratorio listed a weak tremor in Quepos but decidedly strong in the Central Valley.
The depth was estimated by the Laboratorio as just over 9 kilometers or about 5.5 miles.
The impact of the quake appeared to travel in two waves just a few seconds apart. Two distinct waves could be felt in the Central Valley.
There were three quakes Friday One that took place at 3:06 p.m. was estimated to have been north of the Gulf of Nicoya and about 2.6 kilometers southeast of Bebedero de Cañas and about 12.4 kilometers southwest of Cañas Centro. The magnitude was estimated at 3.7.
Two quakes estimated at 3.7 magnitude took place earlier the same day along the Pacific coast.
The Laboratorio said the first took place at 9:45 a.m. about six kilometers north northeast of Damas, Quepos, Aguirre, on the central Pacific coast. The quake was felt all the way to San Pedro, the agency said. The estimate placed the epicenter just a few miles inland.
Just a minute after 1 p.m., the Laboratorio said a quake took place east southeast of Montezuma on the tip of the Nicoya peninsula. The estimate puts the epicenter at the mouth of the Gulf of Nicoya, a location of frequent seismic activity.
The quake was felt strongest on the tip of the peninsula, the Laboratorio said.