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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 | Reports
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
Sun, 15 Jul
Sun, 15 Jul 19:58 UTCM 3.8 / 109 km21 km5 km al Oeste de La Virgen, Sarapiqui.
Thu, 12 Jul
Thu, 12 Jul 01:25 UTCM 3.0 / 77 km21 km2 km al Sureste de San Antonio, Belen, Heredia.
Wed, 11 Jul
Wed, 11 Jul 21:42 UTCM 3.6 / 63 km37 km5 km al Norte de San Pablo, Turrubares.
Wed, 11 Jul 08:45 UTCM 2.6 / 49 km53 km2 km al Sur de Ceiba, Orotina.
Sat, 7 Jul
Sat, 7 Jul 23:10 UTCM 2.9 / 9 km27 km3 km al Sur de Santa Ana, San Jose.
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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