Santa Ana

sopka – Stratovolcano, El Salvador, Middle America-Caribbean Volcanic Regions

Kde

El Salvador, Middle America-Caribbean Volcanic Regions

Typ (GVP)

Stratovolcano

Nadmořská výška

2 381 m

Tektonické prostředí

Subduction zone / Continental crust (> 25 km)

Poslední známá erupce

2005

Poloha

13,853°, -89,630°

Santa Ana (also known as Ilamatepec), is a massive, dominantly andesitic-to-trachyandesitic stratovolcano in El Salvador immediately W of Coatepeque Caldera. Collapse during the late Pleistocene produced a voluminous debris avalanche that swept into the Pacific Ocean, forming the Acajutla Peninsula. Reconstruction of the volcano subsequently filled most of the collapse scarp. The broad summit is cut by several crescentic craters, and a series of vents and cones have formed along a 20-km-long fissure system that extends from near the town of Chalchuapa NNW of the volcano to the San Marcelino and Cerro la Olla cinder cones on the SE flank. Small to moderate explosive eruptions from both summit and flank vents have been documented since the 16th century. The San Marcelino cinder cone on the SE flank produced a lava flow in 1722 that traveled 13 km E.

Text: Smithsonian Global Volcanism Program.

Údaje o sopce: Smithsonian Global Volcanism Program. Další sopky a průduchy.