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Earth of fire

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

Publié le par Bernard Duyck
Publié dans : #Volcanic news
Veniaminof - zoom on an image Sentinel 2 bands 12,11,4 from 18.10.2018

Veniaminof - zoom on an image Sentinel 2 bands 12,11,4 from 18.10.2018

At Veniaminof, a small activity continues this week at the intracaldeira cone. The western branch of the lava field on the southern flank remains active.

Constant steam emissions can be seen on the Perryville webcam.

On October 18, the emissions were particularly strong, with a plume dominated by steam, with the presence of sulfur dioxide and a small amount of ash, and extending for 30 km to the northeast.

The effusion of lava continues, as indicated by a relatively continuous tremor.

The Veniaminof remains in Volcanic Alert Watch and Orange Aviation Code

Source: AVO

 Veniaminof - This high resolution ESA Sentinel-2 image, dated Saturday, October 6, 2018, shows the continuous effusion of lava and a plume with a thin deposit of tephra towards the north. The flow front Is produced the strongest steam plume and the ice collapses around the edges of the flow front - AVO Dietterich, Hannah; ESA Sentinel-2

 Veniaminof - This high resolution ESA Sentinel-2 image, dated Saturday, October 6, 2018, shows the continuous effusion of lava and a plume with a thin deposit of tephra towards the north. The flow front Is produced the strongest steam plume and the ice collapses around the edges of the flow front - AVO Dietterich, Hannah; ESA Sentinel-2

The images provided by Tropomi show significant sulfur dioxide emissions at Ambrym volcanoes in Vanuatu, and the interaction of the plume on Malekula Island, further west with more than 20,000 inhabitants.
 

Activity of Veniaminof, Ambrym and Merapi.
Activity of Veniaminof, Ambrym and Merapi.
Activity of Veniaminof, Ambrym and Merapi.

An image of Caliop / Nasa determined the height of the July 30, 2018 sulfur-containing aerosol cloud in the stratosphere, impacting a large area.

Ambrym - the cloud of sulfur dioxide at a stratospheric height on 30.07.2018 - image Nasa Caliop / AIRES

Ambrym - the cloud of sulfur dioxide at a stratospheric height on 30.07.2018 - image Nasa Caliop / AIRES

Four lava lakes are currently active on the island.

Sources: AIRES, Tropomi, Nasa Caliop via Simon Carn.

Benbow - up, the main lava lake and down, the secondary lava lake - Haos Blong volkeno photos
Benbow - up, the main lava lake and down, the secondary lava lake - Haos Blong volkeno photos

Benbow - up, the main lava lake and down, the secondary lava lake - Haos Blong volkeno photos

Marum - photo above, the Mbwelesu lava lake and downstairs, the Niri Mbwelesu - photos Haos Blong Volkeno
Marum - photo above, the Mbwelesu lava lake and downstairs, the Niri Mbwelesu - photos Haos Blong Volkeno

Marum - photo above, the Mbwelesu lava lake and downstairs, the Niri Mbwelesu - photos Haos Blong Volkeno

At Merapi, the phase of effusive activity continues: the dome reaches 18 October a volume of 201,000 m³, with a daily rate of growth rising to 6,200m³. The small lobe of the dome on the north side seems to progress.

The dome is considered stable for the moment, and the level of activity remains at 2 / Waspada, with a forbidden zone of 3 km radius around the summit.

Source: PVMBG

Merapi - growth of the lava dome at 18.10.2018 - Doc.PVMBG

Merapi - growth of the lava dome at 18.10.2018 - Doc.PVMBG

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