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Latest news from Poas volcano:
mié, 13 may 2020, 08:43
Poas volcano (Costa Rica): incandescence visible from crater
Incandescence from Poas volcano on 6 May (image: OVSICORI)
On 6 May between 04:00-06:00 local time OVSICORI-UNA reported visible incandescence associated with fumarolic activity located south of the Boca A. Seismicity remains stable including regular intervals of 200 to 300 per day. No eruption was detected. The lake level is stable. leer todo
jue, 13 feb 2020, 03:58
Poas volcano (Costa Rica): Increased SO 2 emissions but volcano remains calm
OVSICORI-UNA report that there is currently a stable fluctuation pattern of seismic activity at the volcano. There is continued inflation but not a significant amount. Carbon dioxide/Sulfur dioxide (CO 2 / SO 2) ratios remains stable with the exception of a peak on February 9. There is almost no Hydrogen sulfide (H 2 S). Sulfur dioxide emissions significantly increased over the weekend (February 8-9). The crater lake level has also decreased. ... leer todo

Poas volcano

Stratovolcano 2708 m (8,884 ft)
Costa Rica, 10.2°N / -84.23°W
Current status: restless (2 out of 5)
Last update: 13 May 2020 (steaming)

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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Poas webcams / datos en tiempo real | Books | Tours
Typical eruption style: Phreatic eruptions, sometimes geyser-like ejections of water from the acid crater lake.
Erupciones del volcán 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, 2011, 2012, 2013, 2014, 2016, 2017

Latest nearby earthquakes

Fecha / HoraRevista / ProfundidadDistanciaUbicación
Wed, 20 Jan 2021 (GMT)
20 ene 2021 17:24 (GMT -6) (20 Jan 2021 23:24:00 GMT)
2.7

9 km - More		39 km2.9 km al norte de San Miguel, Desamparados, San Jose, Costa Rica
Tue, 12 Jan 2021 (GMT)
12 de enero del 2021 4:59 am (12 Jan 2021 10:59:00 GMT)
2.5

9 km - More		38 kmDesamparados, 2.2 km al suroeste de Curridabat, Provincia de San José, Costa Rica
Mon, 11 Jan 2021 (GMT)
11 de enero del 2021 1:28 am (11 Jan 2021 07:28:00 GMT)
2.4

7 km - More		32 kmSanta Ana, 2.5 km al este de Colon, Mora, Provincia de San José, Costa Rica
Sat, 9 Jan 2021 (GMT)
9 ene 2021 07:06 (GMT -6) (9 Jan 2021 13:06:00 GMT)
2.6

12 km - More		38 kmSan José, 2.3 km al oeste de Curridabat, San Jose, Costa Rica
8 ene 2021 19:33 (GMT -6) (9 Jan 2021 01:33:00 GMT)
2.6

10 km - More		38 kmDesamparados, 3.2 km al suroeste de Curridabat, San Jose, Costa Rica

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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