Arenal travel guide

The Arenal Volcano, in Spanish Volcán Arenal, is an active andesitic stratovolcano in north-western Costa Rica (10.5N, 84.7W), around 90 km north-west of San José, in the province of Alajuela, canton of San Carlos, and district of La Fortuna. Recognized as a volcano since the 19th century, it was known by foreign investigators as "Volcan Costa Rica, Rio Frio", "Canastos" Volcano and "Cerro de los Guatusos". Arenal is the youngest and most active of all the mountains in Costa Rica. Scientists have been able to date it back to more than 4000 years ago. The area remained largely unexplored until 1937, when a documented expedition took place to reach the summit.
Once locally known as Cerro Arenal (i.e. Mount Arenal) it was presumed extinct until July 29, 1968 when an earthquake caused it to erupt, after approximately 400 years of dormancy. The eruption wiped out the town of Arenal and killed 87 people http://www.arenal.net/arenal-volcano-1968-eruption.htm. It lasted for several days, and during that time destroyed crops, property, livestock, and forests. 15 square kilometers were buried and the explosion affected over 232 square kilometers. The eruption caused three new and active craters to form. Before the eruption, there was a wide veriety of plant and wildlife on the mountain. It has been active since the explosion and can be reported to have minor eruptions every 5-10 minutes. (...) more....

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