Special report of volcanic activity (REA)
Bio Bio region
March 18, 2016 1:50 p.m. HL
The Servicio Nacional de Geología y Minería (SERNAGEOMIN), through the Observatorio Volcanológico de los Andes del Sur(OVDAS) reports that :
Friday, March 18, 2016, from 8:44 local time (11:44 GMT), there was a change in seismic activity of the volcanic complex of Nevados de Chillan, represented by the appearance of an episode of long-period seismicity (signals related to the movement of fluids in the volcanic system), repetitive, at a rate of occurrence of 3 to 4 events per minute, low energy (DRC> 1cm2) but significant from a qualitative point of view, because it suggests a increase in activity of a superficial magmatic system.
With this scenario, the possibility of occurrence of explosions and / or eruptions phreatic and / or phreatomagmatic , increases, of a higher intensity compared to those that occurred previously. Therefore, it is suggested to consider as high risk the volcanic area of 2 km around the active craters recently and completely restrict it’s access.
The level of technical volcanic alert remains at yellow level, with particular attention to its evolution.
SERNAGEOMIN -OVDAS continuous online monitoring and report timely to the changes in volcanic activity in the region.
March 20 , 2016.Nevados de Chillan, Chile :
Source : SERNAGEOMIN -OVDAS