The eruption of the Piton de la Fournaise is not weakening ... a strong degassing remains under the surveillance teams of the observatory.
Friday, mixed teams of OVPF, the LACy (Atmospheric Laboratory and cyclones) and Italian researchers have pursued measures : a gas sampling was done, sulfur dioxide can in fact turn into acid Sulphuric in contact with high humidity, and generate acid rain.
The pH of rainwater collected on the eruptive site displays 2.9, while the normal pH of rainwater approximates a value of 6.The temperature of the lava was measured Tuesday at about 1,200 ° C, the temperature higher than usually can come from the major gas producing at the exit of eruptive vents. The lava volume emitted remains approximately 5 m³ / s.
- Clicanoo & Fournaise info
In Ecuador, the Tungurahua and Cotopaxi presented both beautiful eruptive plumes.
On Friday.In Tungurahua, ash emissions are mounted up to 2,000 meters above the crater; ash falls, thin and black, are reported on Choglontus, El Manzano and near Guaranda. Seismicity is characterized by an emission tremor that lasted at least three hours, and by 56 earthquakes LP and 2 VT.
Cotopaxi emissions were measured at up to 1,500 meters above the crater, with a little panache less laden of ash, heading west. Sulfur dioxide valeure are 2.389 tons / day.
A duty of memory ... Thirty years have passed since the strong phreatic eruption which marked the Arenas crater of Nevado del Ruiz in Colombia, on September 11, 1985.
Previously known as "EL LEON dormido" / the sleeping lion, the volcano began, with this first episode, a major eruption which resulted in the climax of 13 November on lahars that buried Armero and its people.