Tungurahua volcano news & eruption updates:
Tungurahua volcano (Ecuador), eruption summary 15-21 Aug 2012
Wednesday Aug 22, 2012 10:05 AM | BY: T
IG reported that on 15 August three small explosions from Tungurahua were detected along with continuous tremor. An ash plume rose 1 km above the crater and drifted W, producing ashfall in El Manzano (8 km SW) and Pillate (7 km W). Activity increased the next day, characterized by increased tremor, roaring sounds, and instances of vibrating windows. An ash plume again rose 1 km, drifted W, and produced ashfall in El Manzano and Pillate. On 17 August two long periods of tremor associated with emissions were detected; 10 explosions were also recorded. Periodic clear views of the crater showed continuous steam-and-ash plumes rising 1.5-3 km above the crater and drifting WNW. Ash fell in Pillate and Bilbao (8 km W). Activity significantly increased at 2100, and strong explosions were detected. Cloud cover prevented visual observations.
In the morning of 18 August, satellite images showed a 50-km-long plume drifting NW. A pyroclastic flow deposit on the NW flank was observed with a thermal camera. Steam-and-ash plumes rose 1.5 km and drifted WNW; ashfall was reported in Choglontús (SW), Pillate, and San Juan de Pillate (9 km W). Strong glow from the crater was observed at night, along with incandescent blocks rolling down the top of the cone. A pyroclastic flow descended the NE flank, and a lava flow on the N flank traveled 500 m.
Activity remained elevated on 19 and 20 August; continuous tremor indicating emissions was detected, along with nine explosions on 19 August and five on 20 August. Steam-and-ash plumes rose 1.5-2 km and drifted W and SW. Ash fell in Pillate, Igualata (20 km W), El Santuario, Hualpamba, Cevallos (23 km NW), Quero (20 km NW), Mocha (25 km WNW), Santa Anita, and Tisaleo (29 km NW). Roaring sounds were heard and explosions vibrated windows. Strombolian activity ejected incandescent blocks that landed a few hundred meters away. An overflight on 20 August revealed an 80-m-wide inner crater that contained lava. Blocks had accumulated at the headwaters of streams on the SW, W, and NW flanks. According to a news article, 110 families were evacuated.
On 21 August 16 large explosions were detected and again caused windows to vibrate. Strong "cannon shots" were heard in areas as far as Ambato (40 km NW), Riobamba (30 km S), and Milagro, though roaring noises decreased in intensity and duration compared to the previous few days. Ash plumes rose 1.5-5 km and drifted W, and a pyroclastic flow traveled 2.5 km down the NW flank.
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Wednesday, Aug 22, 2012
Tungurahua's eruption continues. This morning, a tall ash plume was rising to 32,000 ft (ca. 10 km) altitude and drifting west. A slight decrease in tremor is visible on the latest seismograms. ... [more]
Tuesday, Aug 21, 2012
The volcano continues to emit a near constant steam and ash plume rising on average 1.5 km with peaks of up to 4 km above the crater. This activity produces significant ash fall in areas west of the volcano such as Sabañag, Santuario, Hualcanga Santa Anita, Jaloa la Playa, Pillate, Hierbabuena, San Juan and other rural areas of Quero, Cevallos, Tisaleo and Mocha. ... [more]
Tungurahua volcano (Ecuador), eruption update: strong ash emissions, pyroclastic flows and explosions
Monday, Aug 20, 2012
The eruption continues with constant steam and ash emissions generating a plume 1.5 km above the crater, intermittent cannon-shot-like explosions of moderate strength, which eject blocks of considerable size, and pyroclastic flows reaching 1.5 km distance. During 19 Aug, 4 pyroclastic flows were counted that went towards the areas of Cusúa and La Pirámide. ... [more]
Sunday, Aug 19, 2012
At 19h36 (local time) on 18 August, a possible lava flow from the summit crater and incandescent lava blocks continuously tumbling down were observed using thermal imagery. ... [more]
Friday, Aug 17, 2012
A constant strong tremor signal is visible and the volcano is producing a strong steam plume with intermittent but still small ash explosions. VAAC Washington warns about ash at 20,000 ft, although is not able to identify it on satellite imagery. [more]