The northwestern Guanacaste province shook Monday with five earthquakes during a six-hour period.

The first quake occurred at 1:39 p.m. and measured 3.4 on the Richter scale. It was felt in the Guanacaste beach towns of Sámara, Carrillo and Nicoya, according to a statement from the Volcanological and Seismological Observatory of Costa Rica (OVSICORI) based at the National University (UNA), north of San José.

The second occurred at 4:33 p.m., had a magnitude of 3.2 and was felt in Sámara and Carrillo. Shortly later at 5:59 p.m., another quake shook these two towns, measuring 3.4 on the Richter scale.

Two more quakes followed at 6:22 p.m. and 7:27 p.m., with magnitudes of 4.3 and 3.9 respectively. Both were felt around the Nicoya Peninsula.

All the earthquakes originated 25 kilometers southeast of Nicoya.

Yesterday, two earthquakes shook the Southern Zone area of Pérez Zeldon. The first occurred at 12:26 p.m. and measured 3.7 on the Richter scale while the second occurred 22 minutes later and had a magnitude of 3.8.