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Ash emissions from Tungurahua on 3 July
Sunday, Jul 05, 2015
New ash explosions took place at the volcano the day before yesterday (3 July), generating a plume that rose approx. 1 km above the summit and caused light ash fall on the western slope. ... [more]
Explosion at Tungurahua on 27 April 2015 (IGEPN)
Sunday, May 03, 2015
Intermittent small explosions and ash emissions continue to occur from the volcano. However, its overall activity has been decreasing during the past weeks and the scenario of a larger eruption, which had been expected in early April, has been becoming more unlikely now. ... [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: 5 Jul 2015
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, 2000-14 No recent earthquakes
TimeMag. / DepthDistanceLocation
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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