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Poas volcano
Stratovolcano 2708 m (8,884 ft)
Costa Rica, 10.2°N / -84.23°W
Current status: restless (2 out of 5)
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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
Typical eruption style:
Phreatic eruptions, sometimes geyser-like ejections of water from the acid crater lake.
Last earthquakes nearby
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Volcano news: Poás volcano, Costa Rica

Poas volcano (Costa Rica): decreased seismic activity

Wednesday Jan 29, 2020 09:00 AM | BY: MARTIN

Emissions´s content from Poas volcano (image: OVSICORI)
Emissions´s content from Poas volcano (image: OVSICORI)
OVSICORI recored 3 volcano-tectonic earthquakes on 18 January and one water eruption on 4 January. There is no significant deformation.
The seismic activity has decreased.
The lake temperatures have cycled around 50°C.
Sulfur dioxide (SO2) emissions dropped to an average of 150-400 tonnes/day.
Source: Observatorio Vulcanológico y Sismológico de Costa Rica volcano activity update 29 January 2020
Previous news
Phreatic eruption at Poás on 30 Sep 2019 (image: OVSICORI_UNA webcam)
Thursday, Oct 03, 2019
OVSICORI-UNA reported that during 16-26 September sulfur dioxide emissions from Poás drifted W and NE, causing a sulfur odor in Alajuela, Heredia, San José, and Cartago. Acidic rain was recorded at the official’s house in the Poás Volcano National Park (PNVP) on 23 September and at Universidad Nacional Costa Rica (UNA) in Heredia on 26 September. ... [more]

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