Tungurahua volcano news & eruption updates:
Tungurahua volcano(Ecuador): constant ash emission, explosions and new pyroclastic flows
Wed, 19 Dec 2012, 11:0511:05 AM | BY: T
Tungurahua continued to produce a sustained ash column rising 2-3 km and intermittent stronger explosions. Several pyroclastic flows occurred yesterday (at 05:00 am, 07:47 and 15:30 local time), the one at 07:47 reaching a length of up to 4 km distance near La Hacienda. The deposits of the flows were reported seen in the gorge and reaching the plain in the area between the Mandur and La Hacienda.
Thermal imaging of pyroclastic flow deposits generated during the 18 Dec 2012. Source: S. Vallejo-IGEPN
The flow reached grassland and burned the surrounding vegetation. THe other flows were confined to the upper slope of the volcano.
Throughout the day, tremor and explosion signals were visible on the seismic recordings. More than 100 explosions of small to moderate size occurred, and accompanied by strong gunshot noises that rattled windows.
The constantly raising ash column was reaching 2-3 km height and drifting to the northwest in the morning and later to the southwest and west, and later northeast. Ash fall occurred in Rio Verde, Banos, Runtún, Juive, Pondoa and El Manzano.
Based on first analyses of samples of the ash deposit, IGEPN confirms that new magma has risen to the crater and is being erupted since the vent-clearing explosion on 14 Dec. The ash deposit is mostly 1 to 2 mm thick on average, gray and light cream in color and contains plagioclase crystals.
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Tue, 18 Dec 2012, 11:05
During last night and early today explosions and volcanic tremor continued to be recorded. Pulsating lava fountains and strong strombolian-type ejections of incandescent blocks were observed at night with fountains reaching a height of 1 km and bombs landing on the upper cone. In the morning, a small small pyroclastic flow descended through the gorge of La Hacienda. read all
Mon, 17 Dec 2012, 11:05
Tungurahua volcano (Ecuador) activity update: loud strombolian to vulcanian explosions, strong, near constant ash emissions
During the night 16-17 Dec, some strong explosions occurred that could be heard as far as Pillaro and Salcedo. Medium to strong levels of tremor and emission signals were recorded on the seismographs. Incandescent blocks were seen ejected about 200 m above the crater and landing on the upper flanks. ... read all
Mon, 17 Dec 2012, 09:58
Following the first explosion on Friday, the volcano has entered a second violent phase of activity on Sunday. Numerous explosions have occurred in the morning of Sunday with ash rising up to 8 km above the crater. Small pyroclastic flows have descended the flanks and partly heavy ash fall has been affecting nearby areas. Combined with rainfall the fresh ash deposits have a dangerous potential to generate lahars in drainages surrounding the volcano. ... read all
Fri, 14 Dec 2012, 23:47
A sudden strong ash explosion occurred at Tungurahua volcano in Ecuador today at 14:35 local time. According to local reports, the eruption produced an ash plume rising to 6 km altitude and was visible from Ambato, Riobamba, Pelileo and Patate. The explosion followed an increase in seismicity over the past days. ... read all