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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)
Poas webcams / live data | Reports
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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
Latest satellite images
 

Volcano news: Poás volcano, Costa Rica

Poas volcano (Costa Rica) activity update

Wednesday Apr 10, 2013 15:55 PM | BY: T

Seismic signal from Poás volcano (POA2 station, OVSICORI)
Seismic signal from Poás volcano (POA2 station, OVSICORI)
SO2 plume over Costa Rica's Poas volcano (NOAA)
SO2 plume over Costa Rica's Poas volcano (NOAA)
The seismic signal suggests increased tremor and signals of possible hydrothermal explosions. An elevated SO2 concentration above the area suggests a higher level of degassing activity.
Previous news
Seismic signal from Poás volcano (POA2 station, OVSICORI)
Thursday, Mar 14, 2013
A small swarm of local earthquakes occurred at or near Poas yesterday, possibly related to or indicating small hydrovolcanic explosions. [more]
Tuesday, Oct 30, 2012
Early Sunday morning, 29th October residents reported a rumbling sound from Poas. Then at around 13:00 (local time) the volcano ejected ash and mud 500 M above the crater. Two other eruptions took place at 16:34 and 16:44 (both local time). The eruptions were most probably phreatic. The Alert Level remains at GREEN. [more]
Wednesday, Jun 13, 2012
OVSICORI-UNA reported that phreatic eruptions at Poás occurred on 6, 15, 20 and 26 May. The eruption on 15 May was preceded by about 6 hours of very-low amplitude harmonic tremor. Administrators of the Poás Volcano National Park witnessed the eruption and reported that sediment, water, rock fragments, and plumes were ejected 500 m above the lake surface. The level of the lake dropped ~0.9 m between 8 and 29 May. [more]
High-temperature fumaraoles from the comosite cone (the "dome") at the shore of Poás' crater lake (photo: E. Fernández, 24 Feb 2012)
Tuesday, Mar 13, 2012
During February, Poás activity consisted in strong high-temperature fumarolic activity and sporadic small phreatic explosions, reported by park rangers. ... [more]
Wednesday, Jan 04, 2012
Fieldwork at Poás on 16 December showed new geyser activity from a vent on the N flank of the lava dome that formed in 2011. A water-and-mud fountain rose 5-6 m high, flowed into the lake, and built a terrace along the S shore. ... [more]

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