( 12:08:48 pm, Víctor Hugo Quesada, Arenal Eco Zoo, El Castillo, San Carlos). Picture with zoom of eruption of, front of pyroclastic flow emitted towards SW flank. ( 12:09:01 pm, Víctor Hugo Quesada, Arenal Eco Zoo, El Castillo, San Carlos). Picture of Arenal Volcano eruption of, one of the pyroclastic flows emitted towards SW flank. Volcano National Park authorities, so follow it carefully. Properly safety guidelines applied by tour operator guides and Arenal *Arenal Volcano eruption activity appreciation is possible with To catch it clear: At dawn it is frequently clear and highlighted by the first sunlight beams, which allows for extraordinary pictures. Geographical surroundings: The Tropical Rainforest (habitat of the Jaguar, Tapir, Peccary, Howler Monkey, Blue Morpho Butterfly and Poison Dart Frog among others), Arenal Biological Reserve, Arenal Volcano National Park, Monteverde, Children's Eternal Rainforest, "Los Perdidos" mountains, Chato Volcano (inactive), La Fortuna Waterfall, Hot Springs, Tabacón thermal river, volcanic originated small lakes, Lake Arenal, Venado Cave, La Fortuna village and El Castillo neighbourhood. Geologic Origin & Nature: Arenal Volcano is part of the Pacific Ring of Fire, and originates by the rising of magma through the earth's crust, which is upper mantle melted by the subduction of the Cocos tectonic plate under the Caribbean plate, process which also incorporates oceanic water and yields it a resultant chemical composition and viscosity, all of which impart an explosive behaviour to the eruptions. Volcanic Rock Type: Mainly Basaltic Andesite (54,6 weight% of silica, of dark gray color with cristals of plagioclase, augite and olivine). Volcano Type: Stratovolcano (built by strata of fine material, as the ash and pyroclasts, alternated with strata of solidified lava or volcanic rocks).Ĭraters: Active crater (C) and "inactive" (D). ( 5)Īge: More than 7,000 years (radiocarbon measure on the most up-to-date earliest volcanic eruption evidence) ( 1) (it has been produced 0,7 km³ since the 1968 eruption). There is acidic rain near the crater under gas column, noticeable towards NE as well as NW (towards the national park facilities). Volcanic Activity: Vulcanian and strombolian eruptions (explosive eruptions) with tephra emission and ejection, lava flows, pyroclastic flows, ash and gases. An area of 230 km² was slightly affected by ash fall. Raised an ash column about 10 km in height and a total area of 15 km² towards W, including 2 villages, were completely devastated. ( 2)Ĭurrent Activity Period: 42 years of continuous eruption activity from 1968 to 2010.ġ968 Eruption Effects: Three new fissural craters (A, B and C) by a strong lateral explosion on the western flank and a deposit of pyroclastic materials. Costa Rica.įirst Exploration: In 1937, a 7 people local group climbed up to the top (of the supposed peak) and reported a crater cavity covered with vegetation and featuring fumaroles (a dormant volcano!). Online data ( 11): Arenal Volcano online (OVSICORI webcam is out of service) Most Recent 2012 Eruptions & Activity Report (En Español: Volcán Arenal) Arenal Volcano Facts & Information In addition it remains as one of the most observed and studied volcanoes by the international scientific community.Īccording to the most updated work in the field of some Costa Rican geologists, Arenal age is at least 7,000 years ( 1), time in which it had at least 4 great eruptions highly explosive (plinians), was jointly in eruption with the now extinct Chato Volcano, until this last ended its activity about 3,500 years ago, and devastated nearby indigenous settlements several times in the last four millennia. Several times on a daily basis, including its well known spectacular nocturnal red-hot lava flows. It had remained by 42 years as one of the current 16 most active volcanoes in the world, with a volcanic eruption This creates a really mystical nature experience that attracts a lot of visitors, from tourists while in a Costa Rica vacation, to scientists investigating the manifestations of the Earth power. Arenal Volcano is fully surrounded by Tropical Rainforest, including its flora and fauna, is accompanied by inactive Chato volcano and the relics of another ancient volcanoes, and have two small lakes of emerald colored waterĪt its laps, as an effect of ancient eruptions and its geologic structure. Majestic colossus that started explosively its great and most recent period of volcanic eruption activity in the morning of 29 July 1968, and keeps it continuously but moderately,Īs the most active volcano in Costa Rica.
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