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Random pictures
Latest news from Poas volcano:
Monday, Mar 18, 2019
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [more]
Saturday, Feb 16, 2019
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: restless (2 out of 5)
Poas webcams / live data | Reports
Poas volcano books | Tours
Last update: 18 Mar 2019 (Volcanic Ash Advisory)
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
Wed, 10 Apr 2019
Wed, 10 Apr 08:44 UTCM 2.3 / 15 km20 km3 km al Este de Curridabat, San Jose. (Costa Rica)
Sun, 7 Apr 2019
Sun, 7 Apr 09:59 UTCM 3.4 / 103 km22 km13 km al Oeste de Guapiles, Pococi. (Costa Rica)
Thu, 4 Apr 2019
Thu, 4 Apr 16:21 UTCM 3.5 / 88 km2 km7 km al Este de Toro Amarillo, Valv. Vega. (Costa Rica)
Mon, 1 Apr 2019
Mon, 1 Apr 18:53 UTCM 2.9 / 29 km12 km5 km al Sur de Rio Cuarto, Alajuela. (Costa Rica)
Mon, 25 Mar 2019
Mon, 25 Mar 18:46 UTCM 2.6 / 4 km7 km9 km al Norte de San Isidro, Heredia. (Costa Rica)
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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