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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

In the eastern rift zone of Kilauea, after two days of relative calm, a new fissure (17) is about a half mile northeast from the end of Hinalo Road, very close to fissure 16 that opened about 6 pm. Activity at fissure 16 produced a lava flow that traveled about 250 yards before stalling about 2:30 pm.

Following a day of degassing, spattering marked the crack, located east of Lalipuna Gardens about 1,500 meters from Highway 132. The lava is ejected over a length of about fifty meters, between 6 to 12 meters from height. (Measured by Paradise helicopters)

No other activity in Leilani Estates, where only a strong degassing persists.

Kilauea - East Rift Zone - fissure  # 16 Active in Lalipuna Gardens and Degas Cracks in Leilani Estates - Photo by Bruce Omori / Paradise Helicopters

Kilauea - East Rift Zone - fissure # 16 Active in Lalipuna Gardens and Degas Cracks in Leilani Estates - Photo by Bruce Omori / Paradise Helicopters

Kilauea – East rift zone - At 18:14 HST, HVO received this photo from a Hawaii County Fire Department overflight, showing steaming areas downrift from fissure 16, which developed into fissure 17.

Kilauea – East rift zone - At 18:14 HST, HVO received this photo from a Hawaii County Fire Department overflight, showing steaming areas downrift from fissure 16, which developed into fissure 17.

Kilauea - East rift zone - crack # 16 on 12.05.2018 / 8:27 am HST - photo Hawaii county fire dt via HVO

Kilauea - East rift zone - crack # 16 on 12.05.2018 / 8:27 am HST - photo Hawaii county fire dt via HVO

Kilauea - East rift zone - fissure # 16 on 12.05.2018 - photo Bruce Omori / Paradise Helicopters

Kilauea - East rift zone - fissure # 16 on 12.05.2018 - photo Bruce Omori / Paradise Helicopters

Kilauea - East rift zone -  At 18h14 HST on 12.05.2018, HVO received this photo from a Hawaii County Fire Department overflight, showing steaming areas downrift from fissure 16, which developed into fissure 17.

Kilauea - East rift zone - At 18h14 HST on 12.05.2018, HVO received this photo from a Hawaii County Fire Department overflight, showing steaming areas downrift from fissure 16, which developed into fissure 17.

Main map shows the location of fissure 16, as well as earlier fissures, lava flows, and steaming areas, as of 12:00 p.m. HST, May 12. - USGS

Main map shows the location of fissure 16, as well as earlier fissures, lava flows, and steaming areas, as of 12:00 p.m. HST, May 12. - USGS

The deflation that marks the summit of Kilauea continues: an interferogram made from radar data recollected by the satellites of Cosmo - SkyMed operated by the Italian Space Agency / ASI Spazio, shows a deflation of the summit of an amplitude of about 25 cm between May 8 and May 11 at 18h local.

The same data do not show any obvious deformation of the rift zone near the craters of Pu'u O'o and Makaopuhi.

Kilauea summit zone and rift - interferogram made from radar data collected by the Cosmo-SkyMed satellite constellation operated by the Italian Space Agency (@ASI_spazio). The colored fringes show #deformation of Earth's surface towards or away from the satellite. The more fringes that are clustered together, the more deformation has occurred. Each color cycle is equivalent to 1.5 cm (0.6 in) towards or away from the satellite. The data show deformation that occurred at Kilauea Volcano between May 8 (6 PM local time) and May 11 (6 PM local time). There is no obvious deformation of Kilauea's East Rift Zone in the vicinity of Puu Oo or Makaopuhi craters. Fringes in the vicinity of Puu Oo are topographic errors caused by lava flows that were erupted over the past several years. The fringes on the volcano's south flank, between the summit and the ocean, are probably caused by atmospheric conditions.  - Doc. USGS

Kilauea summit zone and rift - interferogram made from radar data collected by the Cosmo-SkyMed satellite constellation operated by the Italian Space Agency (@ASI_spazio). The colored fringes show #deformation of Earth's surface towards or away from the satellite. The more fringes that are clustered together, the more deformation has occurred. Each color cycle is equivalent to 1.5 cm (0.6 in) towards or away from the satellite. The data show deformation that occurred at Kilauea Volcano between May 8 (6 PM local time) and May 11 (6 PM local time). There is no obvious deformation of Kilauea's East Rift Zone in the vicinity of Puu Oo or Makaopuhi craters. Fringes in the vicinity of Puu Oo are topographic errors caused by lava flows that were erupted over the past several years. The fringes on the volcano's south flank, between the summit and the ocean, are probably caused by atmospheric conditions. - Doc. USGS

The level of the upper lava lake continues to fall; during the day, rock falls from the crater wall generated small plumes of steam, with a relatively low ash container, and very localized ash falls.

A more explosive activity remains possible, and can happen without warning, as shown in a graph from a video of the USGS ... this justifies the prohibitions approaching the moment.

Sources: USGS & Bruce Omori / Paradise Helicopters
 

Kilauea summit  - Lava lake height in the crater Overlook depending on the dates, relative to the groundwater level - Doc. in USGS video

Kilauea summit  - Lava lake height in the crater Overlook depending on the dates, relative to the groundwater level - Doc. in USGS video

Aline Peltier, Director of the Volcanological Observatory of Piton de la Fournaise (OVPF), takes stock of the eruption of Piton de la Fournaise, in an interview with Info, re.


"The activity remains relatively stable at the eruptive site, always with an active main cone that tends to close. {...} We can estimate that 4 to 5 million m3 escaped, continues Aline Peltier. The peculiarity that we have seen in recent days is the progressive obstruction of the eruptive crater.The mouth was 25 m by 25 on May 5, it is now 5 m by 5. This means that the crater It's going to be closed, but if there is still a lot of pressure under the lava plug, you could see an explosion, which happened in the past. "

Piton de La Fournaise this 13.05.2018 / 5h46 TU - Camera Piton Bert / OVPF

Piton de La Fournaise this 13.05.2018 / 5h46 TU - Camera Piton Bert / OVPF

"There is a little less spectacle for the visitors since the Piton Bert, especially since the castings are now located far from the eruptive site.They circulate in a lava tunnel, to come out of these tunnels against Piton de Bert ", says Aline Peltier.

"A lava river 3 km from the main eruptive site"
"During this afternoon's overflight, we had a lava river about 3 kilometers from the main eruptive site."

"Where the lava comes out at the cone is a little less active and tends to get clogged.This afternoon, during our aerial reconnaissance, there were very few projections coming out of the main cone."

"The eruption is no longer visible 20 minutes walk"
"But the second cone, located upstream, was a little more active than in recent days, but to see the lava flows, you have to go a little further, to Piton Bert, they are no longer visible on the red Piton which was 20 minutes walk from the parking Foc-Foc ", said the Director of the Observatory.

Source : L'info.re - via Fournaise.info

2018.05.12 Merapi - new face of the dome on 12.05.2018 - photo Andi Volcanological Guide Indonesia & Volcanoes

2018.05.12 Merapi - new face of the dome on 12.05.2018 - photo Andi Volcanological Guide Indonesia & Volcanoes

At Merapi, after the phreatic eruption of May 11, the crater has another morphology: a vent with an approximate diameter of 20 meters by 10-15 m. opened during the eruption; white fragments and ashes accumulated on the 2010 dome, whose fractures degassed. Screes have possible. The current situation justifies the prohibition of access to the summit within a radius of 2 km, and the ascent of the volcano is only allowed from Pasarbubar.

A yellow VONA was issued on 11 May at 15:01 WITA due to the presence of an ash plume; because of the fog, there is no observation possible.

Sources: PVMBG & Andi Guide
 

Ebeko - 13.05.2018 / 02:36 - Volcanic Ash Advisory VAAC Tokyo

Ebeko - 13.05.2018 / 02:36 - Volcanic Ash Advisory VAAC Tokyo

An ash plume, 2,000 to 2,500 meters high, is reported by KVERT at Ebeko in the northern Kuril archipelago on 13 May, extending about 20 km to the southwest.
A moderate degassing of steam and gas, with a small ash load, continues.
The aviation code remains at Orange, because of possible ash explosions of up to 5,000 meters asl.

Source: KVERT
 

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