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Cosigüina (also spelt Cosegüina) is a stratovolcano located in the western part of Nicaragua. It forms a large peninsula extending into the Gulf of Fonseca. The summit is truncated by a large caldera, 2 x 2.4 km in diameter and 500 m deep, holding a substantial crater lake (Laguna Cosigüina). This cone has grown within an earlier caldera, forming a somma volcano. The earlier caldera rim is still exposed on the north side, but has been buried by the younger cone elsewhere.

Cosigüina
Cosigüina Location in Nicaragua
Highest point
Elevation	872 m (2,861 ft)[1]
Coordinates	12°59′N 87°34′W[1]
Geography
Location	Chinandega Department, Nicaragua
Geology
Mountain type	Stratovolcano
Last eruption	August 1859

Activity

The volcano last erupted in 1859, but its most famous activity occurred on January 20, 1835,[2] when it produced the largest historical eruption in Nicaragua. Ash from the 1835 eruption has been found in Mexico, Costa Rica, and Jamaica. According to an analysis by Berkeley Earth Surface Temperature, the 1835 eruption caused a temporary decrease in the average land temperature of Earth of about 0.75 degrees C.[3]

It has not erupted since 1859, only an instant in terms of geological time. An earthquake swarm was measured near Cosigüina in 2002, indicating that tectonic forces are still active in the region although the volcano is somewhat isolated from the line of more recently active Central American volcanoes to the northwest and southeast. The only indicators of hydrothermal activity at the volcano are intermittently observed gas bubbles in Laguna Cosigüina and a hot spring along the eastern flank of the volcano. The fairly uniform vegetation cover on the volcano's sides also attests to a general lack of gas emissions or “hot spots” on the 872-meter-high cone.

See also

• List of volcanoes in Nicaragua

References

Notes

• Williams, Howel (1952) The great eruption of Coseguina, Nicaragua, 1835, with notes on the Nicaraguan volcanic chain (University of California Publications in geological sciences v. 29, no. 2) University of California Press, Berkeley, OCLC 248539314
• McBirney, Alexander R. and Williams, Howel (1965) Volcanic History of Nicaragua (University of California publications in geological sciences v. 55) University of California Press, Berkeley, OCLC 5506488
• Sanz, Dionisio Martínez (1963) Montañas que arden Editorial Hospicio, Managua, Nicaragua, OCLC 3306591, in Spanish

External links

Media related to Cosigüina at Wikimedia Commons

На других языках

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[de] Cosigüina

Der ca. 870 m hohe Cosigüina auch Cosegüina ist ein zu einer Kette von Schichtvulkanen gehörender Vulkankegel im äußersten Westen von Nicaragua. Er bildet eine ausgedehnte Halbinsel, die in den Golf von Fonseca hineinragt.

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- [en] Cosigüina

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[es] Volcán Cosigüina

Cosigüina es un volcán activo al oeste de Nicaragua, que también era llamado Lacoalguina[1] y se encuentra ubicado en la península de Cosigüina, en el municipio de El Viejo, departamento de Chinandega. El límite norte del volcán Cosigüina es el Golfo de Fonseca. En su interior se encuentra una laguna cratérica que cubre 1.5 km².

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[fr] Cosigüina

Le Cosigüina est un volcan du Nicaragua qui ferme au sud le golfe de Fonseca.

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[it] Monte Cosigüina

IL Monte Cosigüina (anche Cosegüina) è uno stratovulcano situato nella parte occidentale del Nicaragua. Forma una grande penisola che si estende all'interno del Golfo di Fonseca. Il vertice è troncato da una grande caldera, 2 x 2,4 km di diametro e 500 m di profondità, in possesso di un sostanziale lago vulcanico (Laguna Cosigüina). Questo cono è cresciuto all'interno di una caldera precedente, formando un vulcano somma.

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[ru] Косигуина

Косигуина (исп. Cosigüina) — стратовулкан в Центральной Америки.

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