IG Report on recent activity at Tungurahua Volcano
mercredi août 15, 2012 07:19 | AUTEUR : T
"Until last week activity remained at moderate to low levels with small pulses of activity lasting a few days. This quickly changed from Sunday 5 August, when there were two explosions of moderate size.
Friday 10 morning there was an explosion of small magnitude, after which the volcano remained with seismic tremor for more than 5 hours, accompanied by roars of different intensity and emissions of water vapor with moderate to low amounts of ash, accompanied by roars of different intensities.
In the following days, more explosions occurred of low to moderate magnitude and characteristics similar to those already described. As a result of these explosions there were minor ash falls mainly in the western and south-western sectors of the volcano. In the morning of Monday 13 August, light ash falls occurred in the city of Ambato.
From 05h00 (TL) today (14 Aug), there was a substantial increase in seismic tremor, accompanied by intense bangs and roars that in some cases caused the windows vibrate in the Tungurahua Volcano Observatory (OVT), and even slight movements of the soil in Cusúa. Similarly, the steam emission increased, as well as the amount of ash therein. As a result, in the morning, moderate to major ash fall occurred in Cusúa Pillate (Canton Pelileo) and Choglontús (Canton Penipe).
This activity still remained until the time of publishing this report (early 15 Aug GMT). Satellite images this morning (10h45 LT) showed that the ash plumes took a northwestern and westerly direction and is spreading over the provinces of Manabi and Guayas.
The instrumental data also show an increase in the values of monitored parameters (seismic activity, SO2 flow and deformation of the volcanic cone), but we have not found evidence that this activity might increase to levels as those during the eruptions of July and August 2006 in the short term.
Pulses of stronger activity are not ruled out and important activity could occur in the medium and long term.
The technical staff of IG is permanently monitoring this activity and if it displays a greater increase, this will be communicated to the public and the authorities through various means."
mardi, août 14, 2012
An important increase of Tungurahua's activity can be seen on online data. VAAC Washington reports an ash plume at 20,000 ft (6 km) altitude moving WNW, and a strong SO2 plume is visible on satellite imagery. ... [details]
lundi, août 13, 2012
The volcano continues to emit a steam plume with small amounts of ash, and has occasional small to moderate explosions accompanied by gunshot sounds heard around the volcano. [details]
dimanche, août 12, 2012
Tungurahua's activity remains at moderate levels, and produces explosions with gunshot sounds heard around the volcano. Ash reaches elevations of 5-6 km and ash fell in the Chacauco sector. (IG) [details]
samedi, août 11, 2012
Tungurahua's activity has the volcano was elevated yesterday and considered as "moderate" by Instituto Geofisico (IG), who noted that there was a change in seismic activity, represented by the presence of tremor signal corresponding to steam and ash emissions and a small explosion. ... [details]
vendredi, août 10, 2012
The volcano has moderately strong seismic activity with phases of tremor frequently visible, related to fluid movements. No reports of recent explosions. Direct observations have been difficult due to bad weather. [details]
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