Volcano news: Poás volcano, Costa Rica
Poás volcano (Costa Rica): phreatic explosions from crater lake
Mon, 23 Jun 2014, 08:1108:11 AM | BY: T
Phreatic explosions from the acid crater lake continue to occur at the volcano. During a field campaign on 18 June, OVSICORI scientists observed 5 eruptions during 3 hours. Some of them damaged solar panels of measuring instruments.
Series of images from a phreatic eruption at Poás on 20 June (OVSICORI)
A strong eruption on 20 June ejected a dense plume of steam and mud up to 200m above the lake. As the pictures show, it also produced a circular base surge (fast-traveling turbulent pyroclastic flow), typical for explosive magma-water interaction.
Sun, 30 Mar 2014, 09:16
Another small phreatic eruption occurred from the volcano's crater lake Friday morning. ... read all
Thu, 20 Mar 2014, 17:52
Another moderately sized phreatic eruption from the crater lake of the volcano took place yesterday morning at 07:08 local time. ... read all
Wed, 26 Feb 2014, 16:05
An impressive phreatic eruption took place at the volcano yesterday shortly after noon (local time). So-called cypressoide-type jets of water, mud, and solid blocks were ejected in circular directions from the crater lake to heights of approx. 400 m. The webcam that captured the event was covered with mud. ... read all
Thu, 20 Feb 2014, 17:29
A very small phreatic or hydrothermal eruption occurred a week ago. OVSICORI-UNA shared a picture showing a geyser-like ejection of mud from the crater lake. Activity in any case seems to have risen. Karin Leonard who lives at Poas wrote us: ... read all
Thu, 22 Aug 2013, 08:56
A series of small phreatic eruptions occurred on 20 August at the crater lake. The first occurred at 09:55 (local time), ejecting mud and water to 2-3 m height, and a second one, more powerful, at 11:16 reached heights of 10-20 m. ... read all