Tungurahua

This article is about the volcano. For the Ecuadorian province, see Tungurahua Province. For the ship, see BAE Tungurahua.

Tungurahua
View from Riobamba (September 2011)
Highest point
Elevation	5,023 m (16,480 ft)
Prominence	1,554 m (5,098 ft)
Listing	Ultra
Coordinates	1.4700°S 78.4447°W / -1.4700; -78.4447
Naming
English translation	Throat of fire
Language of name	Quechua
Geography
Location	Ecuador
Parent range	Cordillera Oriental, Andes
Topo map(s)	IGM, CT-ÑIV-D1
Geology
Rock age	Holocene (Gomez 1994)
Mountain type	Stratovolcano (active)
Volcanic arc/belt	Northern Volcanic Zone
Last eruption	2000 to 2018 (ongoing)
Climbing
First ascent	1873 by Alphons Stübel and Wilhelm Reiss
Easiest route	Scrambling/Snow/Ice PD

False-color satellite image of Tungurahua (center right, with plume of ash emanating from it) and its neighbor Chimborazo (center left)

Tungurahua, (/tʊŋɡʊˈrɑːwə/; from Quichua tunguri (throat) and rahua (fire), "Throat of Fire") is an active stratovolcano located in the Cordillera Oriental of Ecuador. The volcano gives its name to the province of Tungurahua. Volcanic activity restarted on August 19, 1999, and is ongoing as of 2013, with several major eruptions since then, the last starting on 1 February 2014.

Etymology

According to one theory the name Tungurahua is a combination of the Quichua tunguri (throat) and rahua (fire) meaning "Throat of Fire". According to another theory it is based on the Quichua uraua for crater. Tungurahua is also known as "The Black Giant" and, in local indigenous mythology it is allegedly referred to as Mama Tungurahua ("Mother Tungurahua").

Geography and geology

Sangay

Tungurahua

Quilotoa

Cotopaxi

Illiniza

Antisana

Pichincha

Reventador

Cayambe

Chimborazo

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Major volcanoes in Ecuador

Location

Tungurahua 5,023 metres (16,480 ft) is located in the Cordillera Oriental of the Andes of central Ecuador, 140 kilometres (87 mi) south of the capital Quito. Nearby notable mountains are Chimborazo (6,310 metres (20,700 ft)) and El Altar (5,319 metres (17,451 ft)). It rises above the small thermal springs town of Baños de Agua Santa (1,800 metres (5,900 ft)) which is located at its foot 8 kilometres (5.0 mi) to the north. Other nearby towns are Ambato (30 kilometres (19 mi) to the northwest), Baños and Riobamba (30 kilometres (19 mi) to the southwest). Tungurahua is part of the Sangay National Park.

Glacier

With its elevation of 5,023 metres (16,480 ft), Tungurahua just over tops the snow line (about 4,900 metres (16,100 ft)). Tungurahua's top is snow-covered and did feature a small summit glacier which melted away after the increase of volcanic activity in 1999.

Volcanism

Today's volcanic edifice (Tungurahua III) is constructed inside its predecessor's (Tungurahua II) caldera which collapsed about 3000 (±90) years ago. The original edifice (Tungurahua I) collapsed at the end of the Late Pleistocene.

Historical volcanic activity

Tungurahua's eruptions are strombolian. They produce andesite and dacite. All historical eruptions originated from the summit crater and have been accompanied by strong explosions, pyroclastic flows and sometimes lava flows. In the last 1,300 years Tungurahua entered every 80 to 100 years into an activity phase of which the major have been the ones of 1773, 1886 and 1916–1918.

Recent volcanic activity

In 2000, after a long period of quiescence, the volcano entered an eruptive phase that continues to this day (as of April 2014). The renewed activity in October 1999 produced major ashfall and led to the temporary evacuation of more than 25,000 inhabitants from Baños and the surrounding area Activity continued at a medium level until May 2006, when activity increased dramatically, culminating in violent eruptions on 14 July 2006 and 16 August 2006. The 16 August 2006 eruption has been the most violent since activity commenced in 1999. This eruption was accompanied by a 10 kilometres (6.2 mi) high ash plume which spread over an area of 740 by 180 kilometres (460 by 110 mi), depositing ash and tephra to the southwest of the volcano. Several pyroclastic flows were generated that killed at least five people, and destroyed a number of hamlets and roads on the eastern and northwestern slopes of the volcano.

A further eruption and evacuation occurred on 4 December 2010. Ecuador's National Agency of Risk Control issued a "red alert", later downgraded to orange. The Ecuadorean Institute for Geophysics reported a rapid increase in seismic activity, a number of explosions and an ash cloud reaching 2 kilometres (1.2 mi) in height. Another eruption occurred on 18 December 2012 forcing evacuation of those living on the volcano's slopes. The volcano erupted again in July 2013. On 1 February 2014, the volcano erupted again.

Surveys conducted in early 2020 reveal massive instabilities, and possibly a pressure bulge, along the volcano’s west side, leading to speculation that its next major eruption could collapse the cone in a similar manner to Mount St. Helens’ 1980 eruption.

Tungurahua eruption February 1, 2014 Tungurahua at night 2011 Tungurahua spews hot lava and ash at night, 1999

First ascent

During their seven-year-long South America expedition (1868 to 1876), the German volcanologists Alphons Stübel and Wilhelm Reiss climbed Cotopaxi (Reiss with Angel Escobar; 28 November 1872) and Tungurahua (Stübel with Eusebio Rodríguez; 9 February 1873).

Panorama of Tungurahua from Baños, one week before the 2012 eruptions

See also

• Lists of volcanoes
  • List of volcanoes in Ecuador
  • List of stratovolcanoes

Further reading

• Gómez, Nelson (1994). Atlas del Ecuador. Editorial Ediguias. ISBN 9978-89-009-2.
• IG-EPN (Instituto Geofisico Escuela Politecnica Nacional, Ecuador). "Tungurahua". Archived from the original on 2006-08-24. Retrieved 2006-08-18.
• Neate, Jill (1994). Mountaineering in the Andes. Expedition Advisory Centre. ISBN 0-907649-64-5.
• Ruiz, M; et al. (2006). Source constraints of Tungurahua volcano explosion events. Springer-Verlag. {{cite book}}: |journal= ignored (help)

External links

• Media related to Tungurahua at Wikimedia Commons
• (in Spanish) Instituto Geofisico del Ecuador
• Climbing information for Tungurahua on summitpost.org
• Banos Ecuador Weather | Daily Report