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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: normal or dormant (1 out of 5)
Poas webcams / live data | Reports
Poas volcano books | Tours
Last update: 2 Oct 2018
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
Sun, 11 Nov
Sun, 11 Nov 02:55 UTCM 3.4 / 100 km24 km4 km al Oeste de La Virgen, Sarapiqui.
Thu, 8 Nov
Thu, 8 Nov 22:36 UTCM 3.0 / 4 km12 km18 km al Norte de San Isidro, Heredia.
Mon, 5 Nov
Mon, 5 Nov 18:58 UTCM 3.2 / 6 km41 km6 km al Noroeste de San Mateo, Alajuela.
Sat, 3 Nov
Sat, 3 Nov 08:49 UTCM 3.0 / 47 km47 km4 km al Oeste de Orotina, Alajuela.
Wed, 31 Oct
Wed, 31 Oct 18:24 UTCM 3.4 / 3 km4 km8 km al Noroeste 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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