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Turrialba volcano (Costa Rica) activity update: vigorous steaming, occasional phreatic explosions
Wednesday, May 02, 2012
Turrialba had a small phreatic explosion following an increase of seismic and degassing activity. [more]
Turrialba volcano (Costa Rica) activity update: intense degassing, small phreatic eruption on 12 April
Saturday, Apr 14, 2012
[more]
Rincón de la Vieja volcano (Costa Rica) activity update: small phreatic eruption on 11 April
Thursday, Apr 12, 2012
Over the past weeks, the National Park of Rincón de la Vieja has been observing an increase in volcanic activity, and a small phreatic eruption occurr... [more]
Poas volcano (Costa Rica), activity summary Feb 2012: high-temperature fumarolic activity and sporadic small phreatic explosions
High-temperature fumaraoles from the comosite cone (the "dome") at the shore of Poás' crater lake (photo: E. Fernández, 24 Feb 2012)
Tuesday, Mar 13, 2012
During February, Poás activity consisted in strong high-temperature fumarolic activity and sporadic small phreatic explosions, reported by park ranger... [more]
Arenal volcano (Costa Rica), activity update: continuing resting phase, gas emissions
Monday, Mar 05, 2012
Arenal Volcano continued its rest during February 2012 and showed only gas emissions as activity, the latest monthly report of OBSICORI summarizes. [more]
Volcanoes of Costa Rica
Map showing Costa Rica's most active volcanoes and the location of the plate boundary between the subducting Pacific and the overriding Carribean plate. (Base map created using Jules Verne UNAVCO map tool featuring Face of the Earth (TM)).
Map showing Costa Rica's most active volcanoes and the location of the plate boundary between the subducting Pacific and the overriding Carribean plate. (Base map created using Jules Verne UNAVCO map tool featuring Face of the Earth (TM)).

Volcanoes of Costa Rica

Rincón de la Vieja | Arenal | Poas | Turrialba | Irazu
Costa Rica is a small country but has a lot of active volcanoes aligned like pearls on a chain, caused by the NE subduction of the Pacific tectonic plate under the Carribean plate. Among the country's most active volcanoes are Arenal, Poás and Irazú volcanoes.
Rincón de la Vieja
(complex volcano)		 Rincón de la Vieja is the largest volcano in NW Costa Rica and one of its most active ones. [more]
Arenal
(stratovolcano)		 Arenal volcano seen from Rio CalienteArenal, a major tourist attraction in Costa Rica, is one of the most active volcanoes of Central America. Since a major eruption in 1968, it has been in near-continuous activity building a lava dome and displaying mild explosive activity from the summit crater. [more]
Poas
(stratovolcano)		 Poás is one of Costa Rica´s most active volcanoes, and one of its most frequently visited and prominent ones. It contains a green acid crater lake and during some of its frequent phreatic eruptions, water from the lake is ejected like a geyser. [more]
Turrialba
(stratovolcano)		 Turrialba volcano seen from IrazuTurrialba (3340 m) is the easternmost of Costa Rica's active volcanoes. It is a large stratovolcano with a complex of 3 summit craters and its flanks mostly covered by farmland and forest. vegetation. After its previous eruption in 1866, signs of unrest started in 2006 and new ph... [more]
Irazu
(stratovolcano)		 Irazú (3432 m) immediately east of the capital San José is Costa Rica's highest and one of its most active volcanoes. Tephra fall (ash) during the last major eruption of Irazú in 1963-65 caused heavy damage to infrastructure and life in San José and its surroundings. [more]
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