Tungurahua volcano news & eruption updates:
Tungurahua volcano (Ecuador): activity update
Monday Feb 03, 2014 18:45 PM | BY: T
Image sequence (both thermal and visual) of the main explosion on 1 Feb, showing the collapse of the eruption column into pyroclastic flows (IGPEN)Activity at the volcano continues at similar levels as yesterday with intermittent small to moderately large explosions, producing ash plumes of up to 4 km height.
IGPEN released an illustrated summary of the volcano's activity during the past days including the attached image sequence showing the violent explosion on 1 Feb that generated large pyroclastic flows due to the collapse of the eruption column.
Yesterday, small explosions and ash emissions were recorded. At 10:40 local time, an episode of harmonic tremor with a deep origin was recorded, suggesting that more magma might be rising from depth.
Last night and this morning, there were at least 10 explosions of moderate size which could be heard as heavy gunfire and lasted several minutes. Some were so intense that they could be heard several kilometers away. An ash column rose about 4 km above the summit during the largest explosion and drifted northwards.
IGPEN writes that the most likely scenario for the near future are continuing discrete explosions of similar size as yesterday and today, accompanied with strong ash emissions, causing ash fall and possibly pyroclastic flows.
A second most likely scenario is that activity declines at the surface while internal pressure builds up towards another major explosion.
Both scenarios involve a high risk for anyone in the areas close to the volcano, in particular low-lying areas in and around valleys draining from the mountain, at several (5-10) kilometers distance.
Potentially heavy ash falls can be expected in areas lying in the main wind direction and is likely to seriously affect agriculture, livestock and of course the health of the people exposed to the ash. Furthermore, ash plumes from the current activity are a serious hazard to air traffic in the area.
Sunday, Feb 02, 2014
A strong phase of activity (a paroxysm) occurred yesterday afternoon, with a series of powerful vulcanian explosions, that produced an ash plume surpassing 40,000 ft (13 km) altitude, heavy tephra fall and pyroclastic flows to up to approx 8 km length. ... [more]
Saturday, Feb 01, 2014
Activity continues at the volcano. Several relatively strong ash emissions occurred during the past 12 hours, producing ash plumes rising 2-3 km above the volcano to estimated 26,000 ft (8 km) altitude and drifting SE: ... [more]
Thursday, Jan 30, 2014
A new eruptive phase has begun at the volcano. Since the early morning today, the seismic network detected an increase in earthquakes including signals of small explosions and long-period events and tremor typical for internal fluid movements (gasses and magma). ... [more]
Sunday, Nov 03, 2013
Activity is at moderate levels, characterized by relatively infrequent and small ash explosions. ... [more]
Saturday, Oct 19, 2013
The eruptive phase that had started on 6 Oct, after a quiet interval of 3 months, continues to increase. The volcano observatory reports ash columns rising up to 3 km above the crater and the first occurrence (so far) small pyroclastic flows. ... [more]