Chillán volcano news & activity updates:
Nevados de Chillán volcano (Chile): phreatic ash explosions
Monday Feb 01, 2016 13:15 PM | DOOR: T
Aerial view of Nevados de Chillán volcano's Arrau crater on 30 Jan 2016 (SERNAGEOMIN)
A series of new explosions with small to moderate ash emissions occurred at the volcano during the end of last week. This activity formed a second new crater, approx. 25x30 m wide and located 50 m beneath the northeast flank of Arrau crater, as SERNAGEOMIN staff observed on an overflight on 30 January.
Ash explosion at Chillán on 31 Jan 2016 (SERNAGEOMIN)
According to Chilean scientists, the activity is caused by phreatic (steam-driven) explosions in the shallow hydrotermal disturbances, not by fresh magma. Temperatures in the crater areas were found to be relatively low (approx 120 deg C), which supports this interpretation as well. It is likely that more explosions occur in the near future and an exclusion zone of 2 km around the crater was put in place.
Wednesday, Jan 13, 2016
A short pulse of ash emissions occurred in the evening of 8 Jan 2016 around 18:49 local time. ... [meer...]
Nevados del Chillán volcano (Chile): new seismic monitoring installed as part of early volcano warning program
Friday, Jan 11, 2013
New seismic monitoring equipment has recently been installed by Sernageomin near Chillán volcano, one of Chile's most active volcanoes. First results of the monitoring confirmed that volcanic earthquakes - including some that are felt by local population - are common and frequent at the volcano, something that had long been known but never actually been measured. ... [meer...]