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Latest news from Poas volcano:
Friday, May 03, 2013
A phreatic explosion occurred from the crater lake on 1 May. [more]
Yesterday's signal from Poás volcano
Wednesday, May 01, 2013
A small earthquake swarm occurred yesterday, probably caused by fluid movements bringing heat into the crater lake. Seismicity has calmed down today again. [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: 7 May 2013
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
Poas Volcano Photos

Last earthquakes nearby:
TimeMag. / DepthDistanceLocation
Mon, 20 May
Mon, 20 May 01:46 UTCM 2.5 / 107 km12 km1 km al Noroeste de COLONIA VIRGEN DEL SOCORRO de Alajuela de Alajuela
Sat, 18 May
Sat, 18 May 05:01 UTCM 2.6 / 101 km5 km1 km al Sureste de SAN RAFAELILLO de San Carlos de Alajuela
Sun, 28 Apr
Sun, 28 Apr 23:13 UTCM 2.9 / 127 km20 kmEn las cercanias de SABANILLA de Montes de Oca de San Jos
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

Poas Photos:





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