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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
 Kilauea East rift zone - lava flows around geothermal facilities / PGV (on the left) - photo Bruce omori 27.05.2018

Kilauea East rift zone - lava flows around geothermal facilities / PGV (on the left) - photo Bruce omori 27.05.2018

Activity remains strong in the East rift zone of Kilauea:

 - Fissures 22 and 13 continue to feed the flows leading to the ocean, which remained active during the night of 26 to 27 May. During the day of May 27th, the diet dropped and the absence of white plume indicates a cessation of the return of lava in the ocean.

 - The fissure 21 feeds an a'a lava flow which advances towards the NE on the property of the PGV.

- The activity of fissure 7 has increased during the night, with the production of a large wall of spatters more than 30 meters high. The lava fountains reach 45 to 60 meters in height, and feed a perched pahoehoe flow 6 to 12 meters thick. An immediate evacuation was launched by the Civil Defense for the residents of Nohea, Luana and Kupono Streets at 19:45 on May 27.

- The fissure 8 show three active vents, with flames and spattering.

Kilauea East Rift Zone - Map of cracks and active flows at 27.05.2018 / 2.30 pm loc - Doc HVO-USGS

Kilauea East Rift Zone - Map of cracks and active flows at 27.05.2018 / 2.30 pm loc - Doc HVO-USGS

Kilauea East Rift Zone - Fountainig and Lava Flow on fissure 7 - Photo HVO-USGS

Kilauea East Rift Zone - Fountainig and Lava Flow on fissure 7 - Photo HVO-USGS

At the top of Kilauea, comparative radar imagery of the situation between May 19 and May 25 shows an eruptive vent expansion: it not only continues to extend west, but formed a subsidiary pit in the northern part of the floor of the crater Halema'uma'u. It is approximately 364,000 square meters in size, and is expected to increase further if subsidence of the caldera, falls of rocks and small explosions continue.
 

Caldera summit of Kilauea - evolution of the eruptive vent between May 19 and 25 at 6:30 am - one click to enlarge - USGS radar images

Caldera summit of Kilauea - evolution of the eruptive vent between May 19 and 25 at 6:30 am - one click to enlarge - USGS radar images

Kilauea East Rift Zone - Sulfur deposits on cracks in a road or in a lava field are evidence of sulfur dioxide emissions - photo HVO and video capture.
Kilauea East Rift Zone - Sulfur deposits on cracks in a road or in a lava field are evidence of sulfur dioxide emissions - photo HVO and video capture.

Kilauea East Rift Zone - Sulfur deposits on cracks in a road or in a lava field are evidence of sulfur dioxide emissions - photo HVO and video capture.

The Kilauea lavas covered more than 2,500 acres, or more than 10 million square meters, in the past three weeks; they destroyed a hundred houses or facilities, fortunately no casualties, other than a person hit by a bomb projection.

Sources: HVO-USGS, Civil Defense, Paradise helicopters,
 

Merapi - 27.05.2018 / 9:10 local - photo BPPTKG

Merapi - 27.05.2018 / 9:10 local - photo BPPTKG

The Merapi remains in alert level II / Waspada.

No visual changes in the summit dome, whose temperatures ranged from 161.6 ° C on May 27 to 142.9 ° C on May 28.

Source: PVMBG & PBBTKG

Merapi - temperatures detected in the summit crater, respectively on 27 and 28 May 2018 - images BPPTKG
Merapi - temperatures detected in the summit crater, respectively on 27 and 28 May 2018 - images BPPTKG

Merapi - temperatures detected in the summit crater, respectively on 27 and 28 May 2018 - images BPPTKG

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