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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

The Merapi erupted this 1st June 2018 at 8:20 WIB; the plume rose to 6,000 meters, observed from the Merapi Jrakah post. The maximum amplitude was 77 mm and the duration was 2 minutes. According to the BNPB, the eruption would be phreatic.

Merapi - phreatic eruption of 1 ° June 2018 / 8h20 -22 - photo BPPTKG

Merapi - phreatic eruption of 1 ° June 2018 / 8h20 -22 - photo BPPTKG

Ash falls were reported at 8:58 am around this observation post and at 9:02 am around the Merapi Selo observation post. White smoke appeared in a forest area northwest of 1,500 meters from the volcano, probably indicating burning vegetation.

No deformation is recorded or fluctuation of the geochemical data; the extrusion of magma on the surface can take a long time, its position being estimated more than 3 km below the surface, according to data from the volcano-tectonic earthquake that accompanied the eruption.

The BPPTKG report concludes with the maintenance of the alert level at Waspada / Level II, with a 3-kilometer zone around the summit.

 

Source: Magma Indonesia

Merapi - sismo of 1 ° June 2018 - Doc .Magma Indonesia

Merapi - sismo of 1 ° June 2018 - Doc .Magma Indonesia

In the eastern rift zone of Kilauea, fissure 8 continued to produce lava fountains during the night of 30 to 31.05, reaching 60 to 80 meters in height; a small cone spatter has formed on the leeward side of the fountain, and is about 30 meters high.

The fountains feed the flow to the northeast, and high eruption rates from Fissure 8 have led to the formation of a leveed channel along the western edge of the lava flow ; small overflows occur along its length, and a break in the channel walls could lead to rapid lava flow, and approach to the edge of the flow should be avoided accordingly.

Kilauea East Rift Zone - left, the fountains of fissure 8 and its lava flow - diagonally, other cracks degassing - photo Andrew Hara / Hawaii National Guard overflight 30.05.2018 / 11-12.30 HST

Kilauea East Rift Zone - left, the fountains of fissure 8 and its lava flow - diagonally, other cracks degassing - photo Andrew Hara / Hawaii National Guard overflight 30.05.2018 / 11-12.30 HST

Kilauea East Rift Zone - fissure 8: Fountaining and spatter cone under construction - photo Andrew Hara / Hawaii National Guard overflight 30.05.2018 / 11-12.30 HST

Kilauea East Rift Zone - fissure 8: Fountaining and spatter cone under construction - photo Andrew Hara / Hawaii National Guard overflight 30.05.2018 / 11-12.30 HST

Kilauea East rift zone - map of cracks and active flows at 31.05.2018 / 2 pm loc - Doc. Hvo-USGS

Kilauea East rift zone - map of cracks and active flows at 31.05.2018 / 2 pm loc - Doc. Hvo-USGS

Kilauea East rift zone  - 31.05.2018 - the huge river breached it's deep channel this morning to send another new flow over the banks near the top of Pohoiki Road. - photo Bruce Omori

Kilauea East rift zone - 31.05.2018 - the huge river breached it's deep channel this morning to send another new flow over the banks near the top of Pohoiki Road. - photo Bruce Omori

An additional activity occurred during the night at crack 7/21; the crack 18 is also active, but the lava flow that comes from it has stopped its progression.

The activity at the summit remains in the norms of the previous days.

Source: HVO-USGS

Langila Volcano / PNG - photo by David Gorman - Instagram - 25-27.05.2018 (datum ?)

Langila Volcano / PNG - photo by David Gorman - Instagram - 25-27.05.2018 (datum ?)

Langila - Volcanic ash advisory 25.05.2018 - Doc. VAAC Darwin

Langila - Volcanic ash advisory 25.05.2018 - Doc. VAAC Darwin

The photos of Langila volcano in Papua New Guinea, erupted since April 2, 2016, are rare enough to be mentioned as soon as they are published.

The aviation code is orange.

The Langila consists of a group of four basalto-andesitic cones, overlapping on the eastern flank of Talawe's extinct volvan; the latter is the highest volcano in the Cape Gloucester area, northwest of New Britain.

Frequent explosive eruptions, sometimes accompanied by lava flows, have been recorded since the 19th century from three active craters on the summit of Langila.

Sources:

- photos of David Gorman, via Shérine France

- Global Volcanism Program - Langila

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