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Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
Dukono - activity de visu and in a picture of sat. Himawari - 19.09.2016 / 6:54 p.m.

Dukono - activity de visu and in a picture of sat. Himawari - 19.09.2016 / 6:54 p.m.

In Dukono, in the Moluccas, one could observe de visu on September 19th from 6:54 p.m. local a thick white plume rising to 600 meters, and then moving over 250 km, according to satellite Himawari images. The PVMBG describe levels of tremor between 0.5 and 6mm, dominant at 2 mm.

Source: PVMBG

 

Tungurahua - fumaroles on a tele-photo - 16/9/2016 - photo P.Ramon - OVT / IGEPN

Tungurahua - fumaroles on a tele-photo - 16/9/2016 - photo P.Ramon - OVT / IGEPN

According to the latest report of the Special IGEPN, a reactivation of the activity of the Tungurahua is possible in the short term, in the next days to weeks.

Tungurahua presented, during the last 8 years of activity, 15 periods of calm similar to the current period, characterized by a seismic activity, deformation inflationary trend and surface activity marked by low fumaroles of low energy. This quiet periods were usually followed by small eruptions of VEI 0-1 to 2 with pyroclastic flows. Take into account that 80% of them are coming without a lot of short-term signs (hours or days).

The current deformation of the volcano is clearly related to a magmatic intrusion. The low outgassing may indicate a blockage of the channel that prevents the free passage of magmatic gases. Given that the current quiet period has exceeded six months (185 days) and the sharp increase in seismic activity (LP since 12/09,  tremor since 16 / 09, and the swarm of LP earthquake on18/09), observatory believes that a short-term recovery is possible

Source: IGEPN

Villarica - 18/09/2016 - restless lava lake and slag found on the edges of the crater - Photo Povi / Twitter
Villarica - 18/09/2016 - restless lava lake and slag found on the edges of the crater - Photo Povi / Twitter

Villarica - 18/09/2016 - restless lava lake and slag found on the edges of the crater - Photo Povi / Twitter

In Chile, despite a green alert, the lava lake of Villarica seems restless, as evidenced by the slag found on the crater rim.

Source: P.O.V.I.

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