A violent and unexpected eruption occurred at the volcano Calbuco on 04/22/2015 at 18:00, set by the SERNAGEOMIN in red alert.
The eruption of the volcano, dormant for 43 years, justified the evacuation of the population within a radius of 20 km. Two hundred and seventy families are concerned for the moment, but that number could increase in the coming hours. The alert relates to Puerto Montt and Puerto Varas, in the Los Lagos region, and was also given in southern Argentina, Bariloche which may be reached by the ash fall.
The most energetic phase was extended during half past one, with an eruptive column amount to 15,000 meters above the crater. The plume is then opened and headed north and east.
Around 9:55 p.m. local (0:55 GMT), the seismographs recorded a harmonic tremor, suggesting a possible lava emission in the main crater.
On April 23 at 1:00 local (4:00 GMT), a new eruptive impulse marked the volcano, justifying a 10 km exclusion zone.
The Calbuco, top 2003 meters, is an andesitic stratovolcano lying SW-NE, wearing a summit crater of 400-500 meters wide. Its eruptions were frequent during the Holocene; the largest historical eruption date from 1893 to 1894 with the establishment of a lava dome. The following eruptions have expanded the complex of lava dome in the summit crater. The last eruption of Calbuco dated August, 1972.
- Sernageomin - Calbuco
- Global Volcanism Program - Calbuco