The Escazú area endured six moderate earthquakes Wednesday within five hours.
Monitoring agencies reported the first, a 2.7-magnitude quake, at 6:07 p.m. There were two 3.1-magnitude quakes within a minute of each other at 6:39 and 6:40 p.m. in the vicinity of San Antonio de Escazú.
At 6:45 p.m. and again at 8:05 p.m. there were quakes in the 2.3 to 2.4-magnitude range. The final quake came at 10:54 p.m. The Red Sismológica Nacional said it had a magnitude of 3.0.
Many of the quakes were felt throughout the Central Valley.
The Red Sismológica Nacional attributed the quakes to local faults, and said that earthquakes of 5.0 to 6.5 are possible in the central area of the country.