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Random pictures
Latest news from Poas volcano:
Monday, Nov 06, 2017
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [more]
Satellite image of Poas volcano on 30 Oct 2017
Monday, Oct 30, 2017
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [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
Poas volcano books | Tours
Last update: 6 Nov 2017
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, 2014, 2016, 2017
TimeMag. / DepthDistanceLocation
Mon, 13 Nov
Mon, 13 Nov 10:47 UTCM 3.5 / 91 km12 km3 km al Noroeste de San Pedro, Poas.
Sat, 11 Nov
Sat, 11 Nov 10:18 UTCM 2.4 / 4 km4 km4 km al Este de Llano Grande, Cartago.
Sat, 11 Nov 09:04 UTCM 3.2 / 4 km4 km4 km al Noreste de Llano Grande, Cartago.
Sat, 11 Nov 08:29 UTCM 2.6 / 5 km3 km6 km al Noreste de Llano Grande, Cartago.
Sat, 11 Nov 05:14 UTCM 2.5 / 9 km6 km10 km al Norte de Llano Grande, Cartago.
View all recent quakes
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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