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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 eruptive activity in the fissure system of the lower East rift zone of Kilauea continues on June 11th.

Three nearby lava fountains on fissure 8 are erupting at heights varying between 45 and 55 meters from the cone spatter (35 meters high); if the height of the fountains has diminished a little, their width is increasing, so that the volume effected remains roughly the same, estimated by the HVO between 800,000 and a million cubic meters per day !

Kilauea East rift zone - 11.06.2018 / 5:45 am - three active fountains on fissure 8 - photo Bruce Omori

Kilauea East rift zone - 11.06.2018 / 5:45 am - three active fountains on fissure 8 - photo Bruce Omori

Kilauea East rift zone - 11.06.2018 / 5:45 am - fountains on fissure 8 feed a flow towards the ocean - photo Bruce Omori

Kilauea East rift zone - 11.06.2018 / 5:45 am - fountains on fissure 8 feed a flow towards the ocean - photo Bruce Omori

They feed a channeled stream to the north, then to the east and the entrance to the sea at Kapoho. The channel is almost full, with little or no overflow and has a maximum of 300 meters wide.

A minor incandescence and an effusion of lava mark the fissure 16/18, without significant casting feed.

At the entrance to the sea, minor steam explosions and a vigorous plume are observed.

Kilauea East rift zone - 11.06.2018 / 5.45 am - the new coastline changes in an interesting way - photo Bruce Omori

Kilauea East rift zone - 11.06.2018 / 5.45 am - the new coastline changes in an interesting way - photo Bruce Omori

Kilauea East rift zone - map of active flows at 11.06.2018 / 15h - note the old blue dotted coastline - HVO-USGS map

Kilauea East rift zone - map of active flows at 11.06.2018 / 15h - note the old blue dotted coastline - HVO-USGS map

Kilauea East - extreme thermal anomalies measured by Mirova Modis, at 11.06.2018 / 23:40

Kilauea East - extreme thermal anomalies measured by Mirova Modis, at 11.06.2018 / 23:40

In the morning, two explosions were observed at the summit of Kilauea, respectively at 0:46 and 4:43. New faults and subsidence are evident on the west side of the crater. The crater depth has increased about 820 feet since early May.

Summit sulfur dioxide emissions have dropped to levels one-half of those measured prior to eruptive activity. The gases are transported, with ashes in small quantities, by the prevailing winds.

Source: HVO-USGS

Kilauea - a photogrammetry of the summit on June 8th shows the new topography of Halema'uma'u - Doc. HVO

Kilauea - a photogrammetry of the summit on June 8th shows the new topography of Halema'uma'u - Doc. HVO

The Alaska Volcanological Observatory changed the aviation code from green to yellow for the Great Sinkin, in the Aleutian volcanic arc, this June 10 at 13:26 AKDT.

A signal, following an increase in seismic activity, could correspond this 10 June at 11:49 AKDT / 19:39 UTC to a short phreatic explosion, justifying the level of alert to Advisory.

Source: AVO

 Great Sinkin - archive photo 22.09.2015 / Taryn Lopez / AVO

 Great Sinkin - archive photo 22.09.2015 / Taryn Lopez / AVO

An eruption accompanied by an ash plume was recorded on 10 June at 22:14 local at Agung on the island of Bali.

The plume, which dissipated to the west, could not be observed due to fog.

The maximum amplitude on the seismogram is 22 mm and the duration of the episode of 1 minute 58 sec.

Source: PVMBG

Agung - seismogram of the eruption of the 10.06.2018 / 22h14 loc. - Doc.Magma Indonesia

Agung - seismogram of the eruption of the 10.06.2018 / 22h14 loc. - Doc.Magma Indonesia

Agung - small white plume on 11.06.2018 / 11h54 loc. - photo PVMBG

Agung - small white plume on 11.06.2018 / 11h54 loc. - photo PVMBG

Agung - the crater in zenith view by Sentinel 2 SWIR on 07.06.2018

Agung - the crater in zenith view by Sentinel 2 SWIR on 07.06.2018

Bewildering behavior of the Steamboat geyser in the Yellowstone National Park, with the 9 ° eruption aqueous this June 11 at 01h 06, without any link does it repeat it with the eruptive activity of the volcano.

Source: USGS

An interesting chronicle has been put online by the YVO - link

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