Copahue volcano news & activity updates
Copahue volcano (Chile): alert level raised to orange
vendredi mars 21, 2014 18:58 | AUTEUR : T
Copahue volcano, quiet at the surface, today (SERNAGEOMIN webcam)SERNAGEOMIN raised the alert level of the volcano to orange yesterday after an increase in seismic activity. A pulse of volcanic tremor was detected that could indicate magma moving into the volcano's plumbing system.
On the surface, no unusual activity has been seen at the volcano so far, except that an increase in SO2 emissions (approx 2,300 tons / day) was measured. This supports the idea that magma has risen under the edifice.
Whether this activity is followed by new eruptive activity remains to be seen. In most cases, intrusions of magma under volcanoes do never reach the surface, i.e. produce eruptions.
ONEMI (Civil Defense) published a bulletin stating that civil alert remains at yellow for the highest risk areas, in particular the most proximal areas around the volcano itself, but also include the city of Alto Biobío located 40 km west of the volcano, because it is at the mouth of a valley that drains Copahue on the north side and therefore, a potential pathway for mud flows that could occur during an eruption.
mercredi, mars 12, 2014
The volcano continues to show signs of unrest. A swarm of volcanic-tectonic earthquakes occurred the day before yesterday. SERNAGEOMIN keeps the alert level of the volcano at Yellow. [details]
samedi, nov. 16, 2013
New ash emissions started yesterday shortly before noon (local time) and have been more or less continuous since then. The low-level ash plume is drifting NW. ... [details]
lundi, oct. 07, 2013
Sporadic weak ash venting continues to be observed from time to time. ... [details]
samedi, oct. 05, 2013
The volcano is emitting a weak plume of gas and steam. Minor ash venting could be observed yesterday evening. No glow was visible on night-time webcam images. SERNAGEOMIN has not posted new activity reports. ... [details]
mardi, oct. 01, 2013
New ash emissions started last night. The increase of activity also manifested itself in visible incandescence since the night of 26-27 Sep. The volcano had been quiet since the last time similar ash emissions and some incandescence were spotted in mid August. Sernageomin has not (yet) commented on this new activity. [details]