A series of 75 small earthquakes that were recorded in a period of just 12 hours between Saturday night and Sunday morning in a nearly straight line between Costa Rica’s Irazu and Turrialba volcanoes have some people worried that the so-called “seismic swarm” could be the precursor to violent eruptions.

 

According to Costa Rica’s Volcanological and Seismological Observatory (OVSICORI), all of the temblors measured between 1.0 and 3.2 magnitude.

 

In response to the seismic swarm, OVSICORI has dispatched a team of experts to more closely monitor both the volcanoes and seismic activity in the area.

 

Experts seem split on the issue if the weekend seismic activity could indicate that an eruption of one or both of the volcanoes is imminent.

 

The Turrialba volcano is already in a period of off-again, on-again activity since roaring to life in October 2014 in its largest eruption in 150 years. The volcano’s most recent significant eruption was in February.