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Latest news from Poas volcano:
The first of 3 phreatic explosions at Poás
Freitag, Aug 29, 2014
A series of 3 phreatic explosions occurred at the crater lake after 14:45 local time on Wednesday. The eruptions followed a phase of relative calm during the past months and ejected jets of steam and mud to heights of approx. 100-200 m. [mehr]
Series of images from a phreatic eruption at Poás on 20 June (OVSICORI)
Montag, Jun 23, 2014
Phreatic explosions from the acid crater lake continue to occur at the volcano. During a field campaign on 18 June, OVSICORI scientists observed 5 eruptions during 3 hours. Some of them damaged solar panels of measuring instruments. ... [mehr]

Poas Vulkan

Schichtvulkan 2708 m (8,884 ft)
Costa Rica, 10.2°N / -84.23°W
Aktueller Status: Schwache Aktivität oder Ausbruchswarnung (3 von 5)
Poas Webcams / aktuelle Daten
Letztes Update: 29 Aug 2014 (occasional phreatic explosions from crater lake)
Typische Aktivität: Phreatic eruptions, sometimes geyser-like ejections of water from the acid crater lake.
Ausbrüche des Poas: 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 No recent earthquakes
ZeitMag. / TiefeDistanceOrt
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.

Beschreibung:

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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