Hudson Volcano in Chile—Alert

Last update: October 27, 2011 at 6:58 pm by By 

Cerro Hudson volcano, a Southern  Andean volcano  located in the border area in between Chile and Argentina has started a minor eruption.
SERNAGEOMIN, the Chilean authority who is guarding the activity of the volcanoes hasincreased the alert level from 3 to 5 (Red Alert).

Onemi, the Chile government organization who is coordinating all actions to protect people and infrastructure from being damages /injured has called the RED alert for the following localities : Aysén, Río Ibáñez and Chile Chico in the Aysén area.

Both organizations will of course follow up the situation of Cerro Hudson 24 hours on 24 and 7 days on 7. Due to the remote location of this volcano, the reporting from the eruptions will be far less than it was the case with the Puyehue – Cordón Caulle

ONEMI update October 27 – 18:51 UTC :
There are now three steam vents on the volcano. One of the vents is also emitting ash. The 3 vents are approx. 500 meter from each other (triangular form). This was observed this morning (Chile time) and was analyzed by SERNAGEOMIN technical staff.
119 people are currently evacuated from the Lake Caro area and have moved to houses from relatives in the area. Chile police is trying to evacuate an additional 13 people. Onemi Chile has reported that until this morning nearly 900 volcanic earthquakes were noticed. Only a limited number were felt by the people living in the area. New FlyBy’s are planned later today to follow up what is happening. Onemi also told the press that they are ready to take whatever measures are necessary to control the situation. Emergency staff in the volcano area have been equipped with satellite phones.

Activity report October 26, 2011
Translation of the Sernageomin press statement by
The Red alert (Level 5) has been called by SernaGeomin out of fear that a major eruption could happen in the coming hours or days.
The Hudson volcano eruptions are characterized by eruptive columns of several km high.
The dispersion of this material in the atmosphere could affect localities to N, E and S of the volcano. Unlike most volcanoes in other regions of Chile, Aysen population centers are situated downwind of volcanic centers and therefore are highly likely to receive fall of pyroclastic material.
The huge quantities of ice in the caldera could eventually generate destructive lahars(volcanic mudflow), mainly affecting the river valleys of  Cupquelan and Huemules, located to the NW of the volcano.
Pyroclastic flows could, depending on the magnitude, affect the immediate vicinity of the caldera (within a radius of 15 to 20 km),
SERNAGEOMIN staff and local authorities today conducted a flyby in Hudson Volcano, which could see a column of gas, white and with little ash, about 1.5 km in height, with the subsequent formation of the Rio Huemules lahars. Erupting lava has not been seen. We have to state however that during the 1973 eruption a subglacial eruption occurred. This suggests a process of fissure opening at shallow levels and the onset of an eruptive process that is still minor but can evolve into a major eruption in hours and / or days.

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