In Costa Rica there are 112 volcanic formations. They
belong to so called Pacific Rim of Fire. Seven of them is considered as active
ones. Their activity is connected with fertile soils, which cover the majority
of Costa Rica territory. Their suddenly erruptions made in past years huge
destructions. The highest Costa Rica`s volcanoe is Irazu, the most active is
Arenal and Poas has the second widest crater in the world. (diameter 1,5
In 1950`s, the terrains around each Costa Rican volcanoes were decided to be under protection. Many of them are within the national parks. Costa Rica major volcanic peaks are stratovolcanoes. The
type of magma that fuels most Costa Rica volcanoes is thick, viscous, and so
filled with gases that the erupting magma often blasts violently into the air.
The most serious eruption was that of Irazu volcanoe in
1963. It erupted clouds of smoke and ash that kept shovering over San Jose and
other parts for two years. People had been walking with handkerchief. From roofs
on every day were being scraped layels of polders of even 13 centimetres
thickness. Over 100 square kilometers of the surrounding land were devastated.
The latest eruption in Costa Rica was of Arenal Volcanoe on August 24th, 2000.
One person died and two were severly hurt. 600 residents have been
The active volcanoes of Costa Rica -Poás, Arenal, Rincón de la Vieja, Irazú, and Turrialba- are featured in a year 2002 calendar sponsored by the Volcanology and Seismology Observatory of Costa Rica. The calendar features photos taken by pilot and photographer Federico Chavarría.
Photo gallery of Costa Rica`s volcanos
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