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Poas Volcano

Updated: 28 Μαρτίου 2024 09:45 GMT -
Stratovolcano 2708 m (8,884 ft)
Κόστα Ρίκα, 10.2°N / -84.23°W
Current status: restless (2 out of 5)
Last update: 13 Mar 2024 (Smithsonian / USGS Weekly Volcanic Activity Report)

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.

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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

Latest nearby earthquakes

ΏραMag. / ΒάθοςΑπόσταση / Τοποθεσία
20 Μαρ 02:45 (Costa Rica)
20 Μαρ 08:45 GMT
2.6

12 km
12 km ανατολικά Costa Rica: 4 km al Este de Varablanca, Heredia. Περ.
Παρασκευή, 15 Μαρτίου 2024 GMT (1 σεισμός)
15 Μαρ 01:35 (Costa Rica)
15 Μαρ 07:35 GMT
3.3

89 km
17 km βορειοδυτικά Costa Rica: 8 Km Al Sur De Aguas Zarcas, San Carlos. Περ.

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

Poas Volcano Photos

Latest satellite images

Poas satellite image sat1Poas satellite image sat2

Wed, 13 Mar 2024, 15:00

Poas volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 6 March-12 March 2024 (Continuing Activity)

OVSICORI-UNA reported that about 900 small phreatic eruptions at Poás were recorded by the seismic network and often visually observed during 4 March to around 0800 on 8 March; no additional eruptions were recorded at least through 12 March. The small eruptive events ejected material no higher than 50 m. The water at the bottom of the crater had almost disappeared leaving a couple of muddy water puddles. ... Read all
Thu, 7 Mar 2024, 11:00

Poas volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 6 March-12 March 2024 (Continuing Activity)

OVSICORI-UNA reported that about 900 small phreatic eruptions at Poás were recorded by the seismic network and often visually observed during 4 March to around 0800 on 8 March; no additional eruptions were recorded at least through 12 March. The small eruptive events ejected material no higher than 50 m. The water at the bottom of the crater had almost disappeared leaving a couple of muddy water puddles. ... Read all

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