El Chichón

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El Chichón
El Chichón.jpg
Aerial view on 1982-11-04, seven months after the eruption
Elevation~ 1,205 metres (3,953 ft)
Location
El Chichón is located in Mexico
El Chichón
Francisco León, Chiapas, Mexico
Coordinates17°21′36″N 93°13′40″W / 17.36000°N 93.22778°W / 17.36000; -93.22778Coordinates: 17°21′36″N 93°13′40″W / 17.36000°N 93.22778°W / 17.36000; -93.22778
Geology
TypeLava domes
Age of rock220,000 yr
Volcanic arc/beltChiapanecan Volcanic Arc
Last eruption1982
 
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El Chichón
El Chichón.jpg
Aerial view on 1982-11-04, seven months after the eruption
Elevation~ 1,205 metres (3,953 ft)
Location
El Chichón is located in Mexico
El Chichón
Francisco León, Chiapas, Mexico
Coordinates17°21′36″N 93°13′40″W / 17.36000°N 93.22778°W / 17.36000; -93.22778Coordinates: 17°21′36″N 93°13′40″W / 17.36000°N 93.22778°W / 17.36000; -93.22778
Geology
TypeLava domes
Age of rock220,000 yr
Volcanic arc/beltChiapanecan Volcanic Arc
Last eruption1982

El Chichón, also known as Chichonal (roughly translated in English as "The bump") is an active volcano in Francisco León Municipality in northwestern Chiapas, Mexico. Its only recorded eruptive activity was on March 28, April 3 and April 4, 1982,[1] when it produced a one km-wide caldera that then filled with an acidic crater lake. The number of deaths, although unknown, is estimated around 2,000.[2] It had high-sulfur anhydrite-bearing magma, explosive eruptions, pyroclastic flows, and surges that were devastating to the area surrounding the volcano.

In 2000, the lake's water temperature increased. Also, the lake acquired a blue-green color,this lake was covered with volcanic ash, due to massive amounts of dissolved minerals in the acidic water, and fine, light-colored ashy sediment continually stirred up by boiling areas.

El Chichon is part of a geologic zone known as the Chiapanecan Volcanic Arc. This volcanic region is thought to be the result of the subduction of the Tehuantepec Ridge, an undersea ridge which lies on the Cocos Plate off the Pacific coast of Mexico.[3]

Contents

Names[edit]

El Chichón is known as Pokpachuwe in Chiapas Zoque, meaning 'the burning woman' [4] El Chichón in Spanish can also mean 'the bump'.

Gallery[edit]

Solar radiation transmittance measured at the Mauna Loa Observatory (Hawaii); the eruption of El Chichón caused a decrease of ~16%

See also[edit]

References[edit]

[2]

  1. ^ Alan Robock (2002). "Volcanic Eruption, El Chichón" (PDF). Retrieved 2008-05-20. 
  2. ^ a b Báez-Jorge, F (1985). Cuando el cielo ardió y se quemó la tierra. Mexico: Instituto Nacional Indigenista. p. 158. ISBN 9688220558. 
  3. ^ Vlad C. Manea and Marina Manea (2005). "The origin of modern chiapanecan volcanic arc in southern mexico inferred from thermal models" (PDF). Retrieved 2008-05-20. 
  4. ^ Faarlund, Jan Terje (2012), A Grammar of Chiapas Zoque, Oxford, Oxford University Press

External links[edit]