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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.
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 | ReportsPoas volcano books | Tours
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
Thu, 30 May 2019, 23:00
Satellite image of Poas volcano on 30 May 2019 Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX21 at 22:49 UTC, 30/05/19 from KNES [ less] [ read all]
Mon, 18 Mar 2019, 19:00
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX20 at 18:55 UTC, 18/03/19 from KNES [ less] [ read all]
Sat, 16 Feb 2019, 14:30
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX22 at 14:19 UTC, 16/02/19 from KNES [ less] [ read all]
Fri, 15 Feb 2019, 19:15
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 11000 ft (3400 m) altitude or flight level 110 . ...moreThe full report is as follows: [ less] [ read all]
Fri, 15 Feb 2019, 13:15
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 10000 ft (3000 m) altitude or flight level 100 . ...moreThe full report is as follows: [ less] [ read all]
Fri, 15 Feb 2019, 02:15
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 10000 ft (3000 m) altitude or flight level 100 . ...moreThe full report is as follows: [ less] [ read all]
Thu, 14 Feb 2019, 15:00
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX22 at 14:57 UTC, 14/02/19 from KNES [ less] [ read all]
Wed, 13 Feb 2019, 19:15
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX22 at 19:11 UTC, 13/02/19 from KNES [ less] [ read all]
Wed, 13 Feb 2019, 10:15
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX22 at 10:08 UTC, 13/02/19 from KNES [ less] [ read all]
Tue, 12 Feb 2019, 22:00
Satellite image of Poas volcano on 12 Feb 2019 Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX22 at 21:49 UTC, 12/02/19 from KNES [ less] [ read all]
Show more news
Tue, 12 Feb 2019, 12:15
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX22 at 12:07 UTC, 12/02/19 from KNES [ less] [ read all]
Mon, 11 Feb 2019, 23:15
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX22 at 23:06 UTC, 11/02/19 from KNES [ less] [ read all]
Mon, 11 Feb 2019, 21:12
Ash emissions today seen in volcano observatory webcam. More significant activity began today with persistent low-level ash emissions and incandescence has been observed suggesting some new lava is erupting. The national park that the volcano is located in has been closed as a precaution. This is the first strong activity since the vigorous 2017 eruption. Unrest has been slowly increasing for the last few months.
Mon, 11 Feb 2019, 11:45
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ...moreFVXX22 at 11:35 UTC, 11/02/19 from KNES [ less] [ read all]
Sat, 5 Jan 2019, 08:35
Eruption from Poás' crater lake on 3 Jan 2019 (image: Ovsicori-Una) Ovsicori-una reported frequent steam explosions from the gray acid crater lake, while the lake itself has been decreasing. ...moreSeismicity is dominated by low frequency volcanic earthquakes and sporadic tremor corresponding to the steam eruptions. [ less]
More on VolcanoDiscovery:
 Krakatoa explodes: In the afternoon of 17 Oct, a particularly violent explosion occurred at Anak Krakatau, blasting away a portion of the southern crater rim. A similar event might have been the final trigger for the catastrophic landslide that let the cone collapse and cause a devastating tsunami on 22 Dec 2018.
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