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Random pictures
Latest news from Poas volcano:
Eruption from Poás' crater lake on 3 Jan 2019 (image: Ovsicori-Una)
Saturday, Jan 05, 2019
Ovsicori-una reported frequent steam explosions from the gray acid crater lake, while the lake itself has been decreasing. ... [more]
Monday, Nov 06, 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 | Reports
Poas volcano books | Tours
Last update: 5 Jan 2019
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, 14 Jan
Mon, 14 Jan 05:56 UTCM 3.2 / 79 km15 km2 km al Sureste de San Isidro, Heredia.
Thu, 10 Jan
Thu, 10 Jan 01:17 UTCM 2.7 / 10 km27 km4 km al Oeste de San Antonio, Escazu.
Tue, 8 Jan
Tue, 8 Jan 14:40 UTCM 2.5 / 9 km26 km2 km al Oeste de Escazu, San Jose.
Fri, 4 Jan
Fri, 4 Jan 10:36 UTCM 3.5 / 89 km11 km4 km al Sur de Rio Cuarto, Alajuela.
Tue, 1 Jan
Tue, 1 Jan 12:39 UTCM 3.3 / 77 km1 km8 km al Sureste de Varablanca, Heredia.
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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