Copahue volcano news & activity updates
Copahue volcano (Chile/Argentina) activity update
Samstag Mai 25, 2013 16:08 | VON: T
Steam-ash plume from Copahue on 24 May (SERNAGEOMIN webcam)A steam and ash plume is rising about 1-1.5 km from the crater where it is emitted by 3 vents. Two of these emit only gas and steam. The third one erupts some ash as well, Chilean scientists found out during an helicopter overflight.
It seems that (for now) this activity is phreatic, i.e. involves no fresh magma, only overheated water from the hydrothermal system, that can fragment rock into ash during explosive decompression. Temperature measurements gave a value of only 200°C at the vents.
Freitag, Mai 24, 2013
SERNAGEOMIN has raised the alert level to orange. Since May 15, a progressive increase in seismic activity as well emissions of gas and now some ash have been observed. ... [mehr]
Sonntag, Mai 12, 2013
SERNAGEOMIN has recently raised the alert back to yellow after new small explosions occurred at the volcano and incandescence was observed at the summit crater. A small but persistent steam-and-ash plume has been rising about 350 m from the volcano. Interestingly, little change in the seismic activity has been noticed with the incandescence and explosions, so it is not clear whether this new activity is caused by fresh magma rising towards the surface. [mehr]
Samstag, Apr 20, 2013
Volcanic unrest has been declared over and the volcanic alert level was lowered back to green, as well as the hazard level for the community of Alto Biobio. [mehr]
Freitag, Apr 12, 2013
A pilot reported the emission of steam, gas and minor amounts of volcanic ash from the volcano today (VAAC Buenos Aires). SERNAGEOMIN has not reported unusual activity and maintains alert level yellow. [mehr]