Now the Irazú volcano is hosting a flurry of small earthquakes

Another flurry of earthquakes took place Monday. This time the location was along the base of the Irazú volcano.

The Observatorio Vulcanológico y Sismológico de Costa Rica at Universidad Nacional logged some 40 small quakes between 9:36 a.m. and noon, it said. There were more later in the day. The magnitude did not go over 2.4 for any quake, the observatory said.

Such earthquake clusters are not unusual, said the observatory. In July there were 170 similar quakes, it said.

Quakes are in the news because of a continuing series of earthquakes further to the south near the San José-Cartago provincial border.

Those events were the topic of an extensive new release Monday from the Laboratorio de Ingeniería Sísmica at the Universidad de Costa Rica. The laboratory outlined major earthquakes that have taken place in that area since 1842.

One of the faults in the area generated the Santa Mónica quakes in 1910 that killed 300 persons and destroyed many buildings in the city of Cartago. The laboratory said the situation today is different than in Cartago in 1910 because there is more construction that anticipates earthquakes.

The laboratory said that scientists cannot say if the flurry of quakes south of the Central Valley suggest a larger event may take place. That area is very active, it noted.

The laboratory’s report was full of academic citations and links.

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