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Poas volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 6 April-12 April 2022 (New Activity / Unrest)

mer, 13 apr 2022, 23:59
23:59 PM | AUTORE: VN
OVSICORI-UNA reported that on 6 April at 0240 a phreatic explosion from a vent called “Orange Fumarola” located in a fumarolic field along the inner N crater wall at Poás generated a plume that rose 500 m above the crater rim. Activity lasted for three minutes. The event caused a small landslide that modified the vent.
Some of the material from the landslide was deposited in a narrow strip about 100 m into the Boca A lake. Stirred sediment was visibly moving in convection cells, turning the lake water from green to a uniform milky gray color as the sediment mixed into the water. Subaerial fumarolic vents at the E and S parts of the lake more vigorously emitted gasses following the event and remained at that level at least through 12 April.
Convection in the lake also continued. OVSICORI-UNA noted that satellite data acquired the day before the explosion showed a total of 500 tons of sulfur dioxide released from both Poás and Turrialba.

Source: Observatorio Vulcanologico y Sismologico de Costa Rica-Universidad Nacional (OVSICORI-UNA)
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From: Global Volcanism Program, 2022. Report on Poas. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 6 April-12 April 2022. Smithsonian Institution and US Geological Survey.

News precedente

Fri, 8 Apr 2022, 08:03

Poás volcano (Costa Rica): sudden explosive eruption yesterday morning came without warning

View of Poás volcano the morning before the eruption with visitors near the crater where it occurred later at night (image: OVSICORI-UNA)
An eruption occurred yesterday (7 April) morning at 2.42 a.m. local time from the volcano's crater northern area. The event lasted about 3 minutes and generated a steam plume that rose 500 m from the crater to approx. 3200 m altitude. ... Read all
Wed, 6 Apr 2022, 20:03

Poas volcano (Costa Rica) - Smithsonian / USGS Weekly Volcanic Activity Report for 30 March-5 April 2022 (New Activity / Unrest)

OVSICORI-UNA reported that on 6 April at 0242 a phreatic explosion was detected at the N wall crater wall at Poás, generating a plume that rose 500 m above the crater. Activity lasted for three minutes. ... Read all
Mostra di più
Poas vulcano
Stratovolcano 2708 m (8,884 ft)
Costa Rica, 10.2°N / -84.23°W
Stato attuale: normal or dormant (1 di 5) 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
Stile eruttivo tipico
Phreatic eruptions, sometimes geyser-like ejections of water from the acid crater lake.
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