The level of activity of the volcano is at: YELLOW: changes in the behavior of volcanic activity, probable time for an eruption: -Time / weeks / months.
The National Service of Geology and Mining (SERNAGEOMIN) and national volcano monitoring network (RNVV) through the Volcanological Observatory of Southern Andes (OVDAS), based on the analysis of information obtained by the monitoring equipment and surveillance of the volcanic complex, announces:
During this period 241 seismic events (241) thirty-four of which (34) were classified as volcano – tectonic (VT) associated with rigid material fracturing process were recorded. Similarly, two hundred and seven (207) events associated with the fluid dynamics inside the volcano and identified as volcanic earthquakes long period (LP) and very long period (VLP) were recorded.
Regarding seismic activity VT, local magnitudes (ML) are less than or equal to M2,0. The event‘s largest into energy was located on the North-East side, at 11,3km from El Agrio crater with a depth of about 6.8 km.
As regards the events related to fluid dynamics (LP), these events had a local magnitude (ML) below M1,5 and reduced displacement (RDC) less than 4.7 cm2, while events VLP showed local magnitude (ML) of less than M1.6 and reduced displacement (DRC) below 21,5cm2, these events were located around the active crater.
-During The month, there was a constant tremor signal, primarily associated with the release of particulate matter (gas and ash) from the crater EL Agrio, which recorded values of DRC oscillating, generally less than 2cm2, values considered low for this volcano. The dominant frequencies are concentrated in a bandwidth between 0.5 and 1.5 Hz.
From the data obtained from the four (4) GNSS stations, trying to measure the surface deformation of the volcano, it was observed that the horizontal and vertical components showed small-scale variations.
The sulfur dioxide emissions (SO2) recorded on the Copahue volcano by the team DOAS (Differential Optical Absorption Spectrometry) Triplets Station, located 5 km to the east-northeast (ENE) of the active crater, presented a mean value of 640 ± 268 t / day and a maximum of 1 775 t / day recorded on May 3 The average flow is considered at moderate levels for this volcano.
IP cameras installed near the volcano recorded the constant emission of material from the active crater (El Agrio), mainly whitish degassing accompanied by incandescence. These emissions were characterized by mostly a gray color, showing the presence of particulate material.
May 25 , 2016.Copahue , Chile :
Source : Sernageomin