Two locations — one south of San José in the mountains and the other off the Pacific coast near Dominical — are giving residents the shakes.
There have been repeated earthquakes in both areas. The one just before 5 a.m. a week ago in the Pacific woke up many residents with its 5.0 to 6.0 magnitude.
Out in the southern mountains near Tobosí on the San José-Cartago provincial line there have been many smaller quakes. There was one further south at 11:09 p.m. Friday estimated at 2.7 magnitude. It was about 19 kilometers east south east of Santa María de Dota. That’s about 12 miles. Then there was one Saturday at 11:31 a.m. with a 2.1 magnitude and another Saturday at 11:09 p.m. with a magnitude of 2.3. Both were near Tobosí.
In the Pacific a quake at 11:33 a.m. Sunday was estimated at 4.8 by the Laboratorio de Ingeniería Sísmica at the Universidad de Costa Rica. The Red Sismológica Nacional notes that this quake was in the same area as the Feb. 13 one. There have been up to 50 small quakes in the interval.
None of these quakes caused significant damage, but some residents are getting sick of the periodic shaking.
New reporting methods and more public access to quake information might give the impression that the geologically active country has become more active. Residents now have more information about quakes, including the real time reporting of the Laboratorio de Ingeniería Sísmica on itsWeb page.
In the past residents had to rely on the Observatorio Vulcanológico y Sismológico de Costa Rica and the U.S. Geological Survey. The Observatorio at Universidad Nacional in Heredia was inconsistent, and the Geological Survey reported only quakes 5.0 and above.
The Red Sismológica Nacional is redoing its Web site, so workers there set up a Facebook page that allows residents to report on the magnitude of various quakes in their locations and exchange information with scientists.