El Chichón is an active volcano in northwestern Chiapas, Mexico. Chiapas is the southernmost state of Mexico, located towards the southeast of the country The United Mexican States ( or commonly Mexico (ˈmɛksɪkoʊ () is a federal constitutional Republic in North America. A geographic coordinate system enables every location on the Earth to be specified in three coordinates using mainly a spherical coordinate system. Mountains can be characterized in several ways Some mountains are Volcanoes and can be characterized by the type of lava and eruptive history In Volcanology, a lava dome or plug dome is a roughly circular Mound -shaped protrusion resulting from the slow eruption of Felsic Lava The geologic time scale is a chronologic schema (or idealized Model) relating Stratigraphy to time that is used by Geologists and other Plate tectonics and hotspots Divergent plate boundaries At the Year 1982 ( MCMLXXXII) was a Common year starting on Friday (link displays the 1982 Gregorian calendar) Plate tectonics and hotspots Divergent plate boundaries At the Chiapas is the southernmost state of Mexico, located towards the southeast of the country The United Mexican States ( or commonly Mexico (ˈmɛksɪkoʊ () is a federal constitutional Republic in North America. Its only recorded eruptive activity were on March 29th, April 3rd and April 4th, 1982 ^[1], when it produced a one km-wide caldera that then filled with an acidic crater lake. The kilometre ( American spelling: kilometer) symbol km is a unit of Length in the Metric system, equal to one thousand A caldera is a cauldron-like volcanic feature formed by the collapse of land following a volcanic eruption Crater Lake is a Caldera Lake located in the US state of Oregon. The eruption killed around 2,000 people who lived near the volcano. It had high-sulphur anhydrite-bearing magma, explosive eruptions, pyroclastic flows, and surges that were devastating. A pyroclastic flow (also known as a pyroclastic density current) is a common and devastating result of some volcanic eruptions.

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

In 2000, the lake's water temperature increased. In Optics and Spectroscopy, transmittance is the fraction of incident light at a specified Wavelength that passes through a sample The Mauna Loa Observatory (MLO is an atmospheric baseline station on Mauna Loa volcano, on the big island of Hawaii. The State of Hawaii ( or həˈwaɪʔiː Hawaiian: Mokuāina o Hawaii) is a state in the United States located on an Archipelago in the 2000 ( MM) was a Leap year that started on Saturday of the Common Era, in accordance with the Gregorian calendar. Also, the lake acquired a blue-green color, 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. The Tehuantepec Ridge is a linear undersea ridge located off the west coast of Mexico in the Pacific Ocean. The Cocos Plate is an oceanic Tectonic plate beneath the Pacific Ocean off the west coast of Central America, named for Cocos Island, which rides ^[2]

References

External links

• El Chichon eruption - April 1982, Mexico (inTERRAgate)
• Volcanic Eruption, El Chichon (Rutgers Environmental Science) (PDF format)