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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 : #Actualités volcaniques
Anak Krakatau - Nightlife 19.07.2018 - phot Ferdi Awed / via Copernicus

Anak Krakatau - Nightlife 19.07.2018 - phot Ferdi Awed / via Copernicus

New eruptive flare at Anak Krakatau on July 22, with 232 eruption earthquakes, 136 blast earthquakes, and a continuous tremor of dominant amplitude of 10 mm.

Thermal anomalies are recorded by Mirova: 54 MW on 20.07; 3Mw 21.07; 32 MW on 22.07; and 212 MW on 23.07.

The alert level remains at 2, with a 1 km forbidden area around the crater.

Source: PVMBG

Anak Krakatau - 22.07.2018 - photo Aris Yanto / Exploredesa

Anak Krakatau - 22.07.2018 - photo Aris Yanto / Exploredesa

Krakatau - RSAM from 03.07.2018 to 23.07.2018 - Doc. PVMBG Magma Indonesia

Krakatau - RSAM from 03.07.2018 to 23.07.2018 - Doc. PVMBG Magma Indonesia

 Krakatau - thermal anomalies on 23.07.2018 / 03h10 - Doc.Mirova MODIS_VRP

Krakatau - thermal anomalies on 23.07.2018 / 03h10 - Doc.Mirova MODIS_VRP

In Kilauea, the situation remains unchanged: The fissure 8 continues to produce lava, and feeds the flow towards the ocean. No overflows are reported.

Entries into the sea continues to produce laze plumes, driven inward. The Civil Protection reminds to avoid an exposure because the winds can transport small particles over a long distance, as well as the precautions to be taken.

At 14:00 on 22 July, the edges of the flows have not expanded since 19.07, according to maps provided by the USGS.

Source: HVO-USGS & Hawaii Civil Defense

Kilauea East rift zone - the cone on fissure 8 and the lava flow - USGS photo 22.07.2018

Kilauea East rift zone - the cone on fissure 8 and the lava flow - USGS photo 22.07.2018

 Kilauea East rift zone - A column of rising steam spun wildly, almost forming a large vortex near Pohoiki, but never fully materializing. Conditions seemed to be perfectly conducive for vortices - Photo Bruce Omori

Kilauea East rift zone - A column of rising steam spun wildly, almost forming a large vortex near Pohoiki, but never fully materializing. Conditions seemed to be perfectly conducive for vortices - Photo Bruce Omori

Kilauea East rift zone - The area of overflows just to the northwest of Kapoho Crater, appears to be forming a perched pond. - photo Bruce Omori

Kilauea East rift zone - The area of overflows just to the northwest of Kapoho Crater, appears to be forming a perched pond. - photo Bruce Omori

Kilauea East rift zone - no extension of the area of ​​the flows between the maps of 22.07 / 14h and 19.07 / 12pm - Doc.HVO-USGS - one click to enlarge
Kilauea East rift zone - no extension of the area of ​​the flows between the maps of 22.07 / 14h and 19.07 / 12pm - Doc.HVO-USGS - one click to enlarge

Kilauea East rift zone - no extension of the area of ​​the flows between the maps of 22.07 / 14h and 19.07 / 12pm - Doc.HVO-USGS - one click to enlarge

Rare news comes from Virunga, and active volcanoes Nyiragongo and Nyamulagira, because of the context of war limiting very strongly the visits.

The volcanoes Nyamulagira (at the top of the image) and Nyiragongo (at the bottom of the image) seen by Sentinel 2 on 07.07.2018 and 17.07.2018 - Images Sentinel Hub SWIR - a click to enlarge
The volcanoes Nyamulagira (at the top of the image) and Nyiragongo (at the bottom of the image) seen by Sentinel 2 on 07.07.2018 and 17.07.2018 - Images Sentinel Hub SWIR - a click to enlarge

The volcanoes Nyamulagira (at the top of the image) and Nyiragongo (at the bottom of the image) seen by Sentinel 2 on 07.07.2018 and 17.07.2018 - Images Sentinel Hub SWIR - a click to enlarge

Nyiragongo - image Sentinel 2 SWIR 07.07.2018 / zoom

Nyiragongo - image Sentinel 2 SWIR 07.07.2018 / zoom

Dario Tedesco posted on July 22 photos of both volcanoes, he comments:

" the level of the lava lake of Nyiragongo continues to grow, without imminent danger ".

Nyiragongo - the lava lake and the cone attached to the walls; between the two, the flows of the cone towards the lake - photos Dario Tedesco 22.07.2018
Nyiragongo - the lava lake and the cone attached to the walls; between the two, the flows of the cone towards the lake - photos Dario Tedesco 22.07.2018

Nyiragongo - the lava lake and the cone attached to the walls; between the two, the flows of the cone towards the lake - photos Dario Tedesco 22.07.2018

 " At Nyamulagira, a new eruptive phase marks the volcano; a small lava lake has formed, the magma is a few meters from the surface and seems to embrace the whole crater, the activity is spectacular but without danger ".

Sources: Sentinel2 & commented photos of Dario Tedesco.

Nyamulagira - lava lake in the actuve crater (pit)  - photos Dario Tedesco 22.07.2018
Nyamulagira - lava lake in the actuve crater (pit)  - photos Dario Tedesco 22.07.2018

Nyamulagira - lava lake in the actuve crater (pit)  - photos Dario Tedesco 22.07.2018

Nyamulagira - lava lake in the actuve crater (pit)  - photo Dario Tedesco 22.07.2018

Nyamulagira - lava lake in the actuve crater (pit)  - photo Dario Tedesco 22.07.2018

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