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Explosion at Tungurahua volcano this afternoon
Monday, Apr 14, 2014
Activity decreased during 12 April, but has quickly picked up again. The volcano continues to show intermittent small to moderate vulcanian explosions with ash emissions of up to 3 km above the crater, accompanied by loud detonations and shock waves. In addition, strombolian activity were reported by the observatory. ... [more]
The new lava flow observed on April 10 at 22:03 (Source: P. Ramón OVT / IG)
Saturday, Apr 12, 2014
A lava flow descended from the volcano's summit crater cn the upper NW flank between 10-11 April. The flow likely appeared early of 10 April, it appearance was documented on both visual and infrared photos and corresponds to a tremor signal detected by the observatory. ... [more]

Tungurahua volcano

Stratovolcano 5023 m (16,479 ft)
Ecuador, -1.47°S / -78.44°W
Current status: erupting (4 out of 5)
Tungurahua webcams / live data
Tungurahua volcano videos
Last update: 14 Apr 2014
Typical eruption style: Explosive.
Tungurahua volcano eruptions: 1534, 1557, 1640(?), 1641, 1644(?), 1646(?), 1757(?), 1773, 1776, 1777(?), 1781(?), 1857, 1885(?), 1886-88, 1900(?), 1916-25, 1944, 2000- (ongoing)
Last earthquakes nearby:
TimeMag. / DepthDistanceLocation
Thu, 13 Dec
Thu, 13 Dec 11:50 UTCM 3.1 / 3.3 km40 km Ecuador
Thu, 13 Dec 11:50 UTCM 3.1 / 3.3 km40 km Ecuador
Mon, 5 Nov
Mon, 5 Nov 19:42 UTCM 3.0 / 12.2 km39 km Ecuador
Mon, 5 Nov 19:42 UTCM 3.0 / 12.2 km39 km Ecuador
Sat, 3 Nov
Sat, 3 Nov 14:06 UTCM 3.6 / 12.3 km20 km Ecuador
View all recent quakes
Tungurahua is one of South America's most active volcanoes. Since 2000, a new lava dome has been growing in its summit crater. Tungurahua's activity has been characterized by frequent powerful ash explosions, producing ash plumes of several kilometers height as well as dangerous pyroclastic flows. Part of the population around its base has been evacuated.

Background:

The steep-sided andesitic-dacitic stratovolcano towers more than 3 km above its northern base and consists of three major volcanic edifices sequentially constructed since about 100,000 years ago over a basement of metamorphic rocks.
Tungurahua II was built within the past 14,000 years following the collapse of the initial edifice. Tungurahua II itself collapsed about 3000 years ago and produced a large debris-avalanche deposit and a horseshoe-shaped caldera open to the west, inside which the modern glacier-capped stratovolcano (Tungurahua III) was constructed.

Historical eruptions have all originated from the summit crater. They have been accompanied by strong explosions and sometimes by pyroclastic flows and lava flows that reached populated areas at the volcano's base. Prior to a long-term eruption beginning in 1995 that caused the temporary evacuation of the city of Baños at the foot of the volcano, the last major eruption had occurred from 1916 to 1918, although minor activity continued until 1925.

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