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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 ash emissions from the crater Overlook, located within the crater Halema'uma'u of Kilauea increased in intensity on May 15, to become continuous, and justify the passage to the red aviation code !

Kilauea - Overlook crater - plume of ashes and ashes falls this 15.05.2018 - photo HVO - USGS

Kilauea - Overlook crater - plume of ashes and ashes falls this 15.05.2018 - photo HVO - USGS

Kilauea - the plume of ash from the crater Overlook seen this 15.05.2018 / 11:05 from the Jaggar Museum - Photo HVO-USGS

Kilauea - the plume of ash from the crater Overlook seen this 15.05.2018 / 11:05 from the Jaggar Museum - Photo HVO-USGS

The plume rises to 3,000 - 3,700 meters asl altitude, drifting under the prevailing winds to the southwest.

Ash falls and VOG / Volcanic air pollution are reported as far as Pahala, about 30 km away, and in the Ka'u desert

These ash emissions are variable with periods of higher intensities depending on the occurrence of rock falls in the vent.

NASA astronaut Drew Faustel photographed on May 13, 2018 the ash plume of Kilauea from the ISS

NASA astronaut Drew Faustel photographed on May 13, 2018 the ash plume of Kilauea from the ISS

In the eastern rift zone, the eruptive activity remains concentrated on crack 17, with intermittent spattering at crack 18.

The advance of the lava flow has slowed down and has been 380 meters since 2:30; At 6:45 am, the flow was 2,500 meters long.

During the night of May 14-15, a new crack - the 20 ° - opened in Lanipuna Gardens, NE of the 19th. It produced two small lava patches.

A thick and viscous a'a lava flow emanates from the crack 17 - photo HVO-USGS 15.05.2018

A thick and viscous a'a lava flow emanates from the crack 17 - photo HVO-USGS 15.05.2018

Thermal map of the NE end of the crack system on 15.05.2018 / 6:45 am - with location of crack 20, and the temperature of the flow in a gray scale, the brightest pixels corresponding to the highest temperatures - note the widening of the front to flow and the area where large jets of vapors have been reported - Doc. USGS / Digital Globe

Thermal map of the NE end of the crack system on 15.05.2018 / 6:45 am - with location of crack 20, and the temperature of the flow in a gray scale, the brightest pixels corresponding to the highest temperatures - note the widening of the front to flow and the area where large jets of vapors have been reported - Doc. USGS / Digital Globe

2018.05.14 Kilauea - East Rift One - 14.05.2018 / 2.30pm - Steam Jets on fissure 17 in the Active Fountaining Zone - Photo HVO - USGS

2018.05.14 Kilauea - East Rift One - 14.05.2018 / 2.30pm - Steam Jets on fissure 17 in the Active Fountaining Zone - Photo HVO - USGS

Gas emissions from the fissure are always important. A red alert is in effect for Lanipuna Gardens and surrounding farms ... which means a risk of immediate danger to health due to high levels of sulfur dioxide.

The magma still feeds the Lower East rift zone, as shown by the lateral shift to the northwest of the GPS station. The earthquake location did not move to a lower rift zone in the past 2-3 days.

Sources:

- HVO, NASA satellite and ISS, Copernicus EU

- Hawaii Interagency Information Vog Dashboard - link

Emanations of fissure 17 in the morning of 14.05.2018 - Photo HVO - USGS

Emanations of fissure 17 in the morning of 14.05.2018 - Photo HVO - USGS

At the Piton de La Fournaise, the OVPF informs of a sudden increase in the intensity of the tremor between 5 am and 9 am local time on May 15, the tremor is stable again for several hours on values ​​twice as high as those of the previous day .

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 20h00 (16h UTC) on April 27th and 15h30 (11h30 UTC) on May 15th on the seismic station of BOR (located at the summit). (© IPGP / OVPF)

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 20h00 (16h UTC) on April 27th and 15h30 (11h30 UTC) on May 15th on the seismic station of BOR (located at the summit). (© IPGP / OVPF)

The flow activity always takes place mainly in lava tunnels. In the morning, some resurgences were visible at the foot of Piton Bert. These resurgences are at the origin of many fire starts at the foot of the rampart downstream of Piton Bert.
 

Piton de La Fournaise - 15.05.2018 / 11h loc. - resurgence at the foot of Piton Bert (© OVPF-IPGP)

Piton de La Fournaise - 15.05.2018 / 11h loc. - resurgence at the foot of Piton Bert (© OVPF-IPGP)

Piton de La Fournaise - thermal anomalies of the last days - doc. Mirova Modis 15.05.2018 / 21.30
Piton de La Fournaise - thermal anomalies of the last days - doc. Mirova Modis 15.05.2018 / 21.30

Piton de La Fournaise - thermal anomalies of the last days - doc. Mirova Modis 15.05.2018 / 21.30

Surface flows estimated from satellite data, via the MIROVA platform (University of Turin), recorded in the last 24 hours were between 1 and 2 m3 / s.

The CO2 concentrations in the air at the summit, and the CO2 concentrations in the soil in the Plains region and at the volcano deposit level remain high.

The inflation (swelling) of the building seems to resume. This parameter will be confirmed in the coming days.

Source: OVPF

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