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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

At Turrialba, an explosion in the night nearly unnoticed: January 3 at 2:52, the thermal camera of the RSN recorded a flash of light corresponding to the sudden release of hot magmatic gas (an exothermic reaction in contact with atmospheric oxygen , by Dr. M.Martinez of Ovsicori) ;

the seismic impact lasted about 30 seconds, in a context of low seismicity since December 2015.

Sources:
- RSN - the opinion of Dr. M.Mora 01/05/2016
- Ovsicori - Communication Dr. Martinez

Vidéo of explosion : https://www.facebook.com/RSN.CR/videos/1041746369222269/

Seismic trace of the explosion of January 3 - courtesy of Dr. M.Martinez / Ovsicori - Facebook

Seismic trace of the explosion of January 3 - courtesy of Dr. M.Martinez / Ovsicori - Facebook

Turrialba - activity 01.12.2015 / 6:38 - webcam RSN

Turrialba - activity 01.12.2015 / 6:38 - webcam RSN

At Kilauea, activity has changed at the summit lava lake contained in Overlook vent within the Halema'uma'u crater.

On January 2, a partial collapse of the wall impacted the lava lake, generating a small explosion captured by the webcam of the HVO. A small amount of tephra was projected on the edge of the crater Halama'uma'u, at the overlook.

 

Kilauea - collapse in Overlook vent 01.02.2016 / 2:17 p.m. - Doc. HVO / USGS

Kilauea - collapse in Overlook vent 01.02.2016 / 2:17 p.m. - Doc. HVO / USGS

Kilauea - collapse in Overlook vent 01.02.2016 / 2:17 p.m. - HVO webcam picture

Kilauea - collapse in Overlook vent 01.02.2016 / 2:17 p.m. - HVO webcam picture

Kilauea - Overlooh vent - the trace of the collapse is visible, light gray, just left of the spaterring area - photo HVO / USGS

Kilauea - Overlooh vent - the trace of the collapse is visible, light gray, just left of the spaterring area - photo HVO / USGS

On January 4, at 3:18, this episode was repeated, characterized by a variabletremor, reflecting changes in the strength of the spattering of the lava lake. The webcam recorded the gas and ash plume at the time of collapse.

The Observatory notes that the level of the lava lake has dropped 30-35 meters below the floor of Halema'uma'u crater after a deflationary phenomenon began on January 1st.

 

Kilauea - explosion caused by the collapse in Overlook vent - 01.04.2016 / 3:18 - HVO webcam picture

Kilauea - explosion caused by the collapse in Overlook vent - 01.04.2016 / 3:18 - HVO webcam picture

A persistent glow is seen by the cameras at perennial springs in the crater of Pu'u O'o and high on the northeast flank of the cone. Some small streams are coming out of a vent on the northeast side of the crater floor and remained confined within it.

Source: HVO daily reports.
 


... And the rest of the news in pictures!   Nicaragua and Indonesian volcanoes.

01/05/2016 - Masaya - photo Leonisa Colman - Canal4 Nicaragua

01/05/2016 - Masaya - photo Leonisa Colman - Canal4 Nicaragua

01/05/2016 / 16h20 - Bromo - ash plume to 900m, with a different direction - photo LK Adam / Twitter

01/05/2016 / 16h20 - Bromo - ash plume to 900m, with a different direction - photo LK Adam / Twitter

 01.05.2016 / 8:20 a.m. - Sinabung - photo Endrolewa

01.05.2016 / 8:20 a.m. - Sinabung - photo Endrolewa

Soputan - Photo AFP / 01.04.2016 in La Libre.be - and forecasts of ash movement for 01/06/2016 - red aviation code / VAAC Darwin
Soputan - Photo AFP / 01.04.2016 in La Libre.be - and forecasts of ash movement for 01/06/2016 - red aviation code / VAAC Darwin

Soputan - Photo AFP / 01.04.2016 in La Libre.be - and forecasts of ash movement for 01/06/2016 - red aviation code / VAAC Darwin

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