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Latest news from Poas volcano:
Phreatic eruption at Poás volcano Friday morning (OVSICORI-UNA webcam)
Sunday, Mar 30, 2014
Another small phreatic eruption occurred from the volcano's crater lake Friday morning. [more]
Phreatic explosion at Poàs volcano yesterday morning (Ovsicori webcam)
Thursday, Mar 20, 2014
Another moderately sized phreatic eruption from the crater lake of the volcano took place yesterday morning at 07:08 local time. ... [more]

Poas volcano

Stratovolcano 2708 m (8,884 ft)
Costa Rica, 10.2°N / -84.23°W
Current status: minor activity or eruption warning (3 out of 5)
Poas webcams / live data
Last update: 30 Mar 2014
Typical eruption style: Phreatic eruptions, sometimes geyser-like ejections of water from the acid crater lake.
Poas volcano eruptions: 1828, 1834, 1838(?), 1860, 1879(?), 1880, 1888-91, 1895, 1898-1907, 1910, 1910, 1914, 1914-15, 1925, 1929, 1941-46, 1948-51, 1952-57, 1958-61, 1963, 1964-65, 1967, 1969, 1970, 1972-73, 1974-75, 1976, 1977, 1977-78, 1978, 1979-80, 1980, 1981, 1987-90, 1991, 1992, 1992-93, 1994, 1996, 2010, 2011, 2012, 2013
Last earthquakes nearby:
TimeMag. / DepthDistanceLocation
Wed, 26 Mar
Wed, 26 Mar 01:41 UTCM 3.2 / 20 km26 km Nicaragua
Tue, 25 Mar
Tue, 25 Mar 02:37 UTCM 3.2 / 7 km31 km Nicaragua
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.

Background:

The broad, well-vegetated edifice of Poás has three craters in a N-S line. The 2708-m-high basaltic-to-dacitic complex stratovolcano is cut by a N-S-trending fissure that extends to the lower northern flank, where a parasite volcano (the Congo stratovolcano) and several explosion craters, or maars, most of them lake-filled, have been created.
Poás has two summit crater lakes. The southermost one, Botos, is cold, clear has not eruptied for about 7500 years. The other crater lake is geothermally heated and -after Kawah Ijen in Indonesia - is probably the world's second most acidic natural lake. Its pH is near zero.
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Source: GVP, Smithsonian Institution

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