Chilean authorities increased the alert level for Puyehue-Cordón Caulle volcano to Yellow (2 of 4) on June 20, 2018, following increased seismic activity detected under the volcano since the beginning of the month. The last eruptive phase of this volcano started on June 4, 2011 and ended in April 2012 (VEI 5). According to parameters observed between June 1 and 15, 2018, a total of 272 earthquakes were


recorded under the volcano, of which 48 were classified as long-period (LP) earthquakes associated with dynamics of fluids inside the volcano.  215 earthquakes were volcano-tectonic, associated with the movement (injection or withdrawal) of magma. These were located 0.6 km (0.4 miles) west of the center of 2011 eruption, at a depth of 2.8 km (1.7 miles). In addition, the seismic network registered 9 hybrid earthquakes of moderate magnitude, associated with evidence of deformation. READ MORE