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Latest news from Arenal volcano:
Wednesday, Sep 18, 2013
OVSICORI mentioned that rockfalls with rumbling noises have increased at the volcano over the past weeks. This could suggest that the volcano has started to wake up from its 3 years of slumber. [more]
Thursday, Sep 12, 2013
OVSICORI-UNA reported that plumes composed mainly of water vapor rose from the NE and SE edges of Arenal's Crater C on 8 and 9 September. Tremors indicative of hydrothermal and magmatic activity were detected on 8 September. ... [more]
 

Arenal volcano

Stratovolcano 1657 m / 5,436 ft
Costa Rica, 10.46°N / -84.7°W
Current status: normal or dormant (1 out of 5)
Arenal webcams / live data | Reports
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Last update: 18 Sep 2013
Typical eruption style: Explosive. Near continuous strombolian activity, occasional major explosive events and lava flows.
Arenal volcano eruptions: 1968-2011, 1968 (major explosion), 1922, 1915(?), 1750, 1530, around 1350 (large, sub-Plinian eruption) Arenal volcano seen from Rio Caliente
TimeMag. / DepthDistanceLocation
Wed, 16 Oct 2019
Wed, 16 Oct 09:08 UTCM 2.6 / 9 km15 km9 km al Este de Fortuna, San Carlos. (Costa Rica)
Sun, 13 Oct 2019
Sun, 13 Oct 13:11 UTCM 2.6 / 14 km27 km5 km al Oeste de Arancibia, Puntarenas. (Costa Rica)
Sun, 13 Oct 09:28 UTCM 2.4 / 6 km22 km7 km al Sureste de Monte Verde, Puntarenas. (Costa Rica)
Sun, 13 Oct 09:25 UTCM 2.8 / 8 km22 km7 km al Sureste de Monte Verde, Puntarenas. (Costa Rica)
Tue, 8 Oct 2019
Tue, 8 Oct 07:32 UTCM 2.5 / 9 km11 km9 km al Norte de Fortuna, San Carlos. (Costa Rica)
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Arenal, 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.

Background:

Volcán Arenal, a beautiful, 1657-m high conical andesitic stratovolcano near Lake Arena, is the youngest and one of the most active stratovolcano in Costa Rica. It is famous for a large explosive eruption in 1968 that killed several people and threw incandescent bombs to 5 km distance from the vent.
Arenal lies along a volcanic chain where activity has migrated to the NW over the past 2 million years, from the late-Pleistocene Los Perdidos lava domes through the Pleistocene-to-Holocene Chato volcano, which contains a 500-m-wide, lake-filled summit crater. The earliest known eruptions of Arenal took place about 7000 years ago, and it was active simulataneously with Cerro Chato volcano until the activity of Chato ended about 3500 years ago.
Growth of Arenal has been characterized by periodic major explosive eruptions at several-hundred-year intervals and periods of lava effusion that armor the cone. Arenal's most recent eruptive period began with a major explosive eruption in 1968. Continuous explosive activity accompanied by slow lava effusion and the occasional emission of pyroclastic flows has occurred since then from vents at the summit and on the upper western flank.
Source: GVP, Smithsonian Institution


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