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Poas vulcano

Aggiornato: 3 ott. 2022 01:52 GMT -
Stratovolcano 2708 m (8,884 ft)
Costa Rica, 10.2°N / -84.23°W
Stato attuale: normal or dormant (1 di 5)
Last update: 14 set 2022 (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.

Mostra la mappa interattiva
Stile eruttivo tipico: Phreatic eruptions, sometimes geyser-like ejections of water from the acid crater lake.
Eruzioni del vulcano 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

Data / oraMag. / Prof.Distanza/Ubicazione
giovedì, 29 settembre 2022 GMT (1 sismo)
29 set 2022 07:01 (GMT -6) (29 set 2022 13:01 GMT)
3.0

5 km
14 km (8.7 mi)
12 km a sud-est da Ciudad Quesada, San Carlos, Provincia de Alajuela, Costa Rica
mercoledì, 28 settembre 2022 GMT (4 sismi)
28 set 2022 10:22 (GMT -6) (28 set 2022 16:22 GMT)
2.9

82 km
33 km (21 mi)
7.7 km a nord ovest da Ciudad Quesada, Costa Rica
28 set 2022 10:22 (GMT -6) (28 set 2022 16:22 GMT)
3.6

96 km
36 km (22 mi)
12 km a nord ovest da Ciudad Quesada, Costa Rica
28 set 2022 06:45 (GMT -6) (28 set 2022 12:45 GMT)
2.7

98 km
29 km (18 mi)
Provincia de Heredia, 57 km a nord da San José, Costa Rica
28 set 2022 02:55 (GMT -6) (28 set 2022 08:55 GMT)
3.3

11 km
72 km (45 mi)
Provincia di Limón, 13 km a nord est da Turrialba, Costa Rica

Sfondo

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 Photos




See also: Sentinel hub | Landsat 8 | NASA FIRMS

Wed, 14 Sep 2022, 14:00

Poas volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 7 September-13 September 2022 (Continuing Activity)

On 9 September OVSICORI-UNA reported that activity at Poás had increased since mid-August, characterized by notably increased seismicity. Seismic signals consisted of tremors with variable amplitudes and durations, prolonged harmonic tremors, and some long-period earthquakes with magnitudes greater than those recorded during 2022; there was no increase in low-frequency earthquakes. The energy of the seismicity had also dramatically increased in the previous few days. ... Read all
Thu, 8 Sep 2022, 10:00

Poas volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 7 September-13 September 2022 (Continuing Activity)

On 9 September OVSICORI-UNA reported that activity at Poás had increased since mid-August, characterized by notably increased seismicity. Seismic signals consisted of tremors with variable amplitudes and durations, prolonged harmonic tremors, and some long-period earthquakes with magnitudes greater than those recorded during 2022; there was no increase in low-frequency earthquakes. The energy of the seismicity had also dramatically increased in the previous few days. ... Read all
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