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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 day of June 1 at Merapi was marked by three eruptive episodes.

The first phreatic episode, at 8:20 WIB, lasting 2 minutes, was accompanied by a plume rising to 6,000 meters, as described in the article yesterday.

He justified the temporary closure of A.Yani airports in Semarang, and A.Sumarno de Boyolali.

Merapi - aerial view of the eruptive plume from 01.06.2018 / around 8:20 am - photo IG Merapi news

Merapi - aerial view of the eruptive plume from 01.06.2018 / around 8:20 am - photo IG Merapi news

Merapi - displacement of the ash cloud from the morning eruption - Himawari satellite image 01.06.2018 / 11:10 WIB

Merapi - displacement of the ash cloud from the morning eruption - Himawari satellite image 01.06.2018 / 11:10 WIB

At 20:24 WIB, there was a new eruption at Mount Merapi with a maximum amplitude of 64 mm, lasting 1.5 minutes with a 2500 m high eruptive column dispersing to the northeast, observed from the PGM post Jrakah.

Merapi - control screens of the eruptive episodes of June 1st, respectively at 20h26 and 21h - one click to enlarge - Doc. BPPTKGMerapi - control screens of the eruptive episodes of June 1st, respectively at 20h26 and 21h - one click to enlarge - Doc. BPPTKG

Merapi - control screens of the eruptive episodes of June 1st, respectively at 20h26 and 21h - one click to enlarge - Doc. BPPTKG

Merapi - seismogram between 01.06.2018 / 14h and 02.06.2018 / 13h. - Doc. Magma Indonesia

Merapi - seismogram between 01.06.2018 / 14h and 02.06.2018 / 13h. - Doc. Magma Indonesia

At 21h WIB, another eruption was accompanied by a plume of 1,000 meters, and lasted 56 sec.

This June 2 at 5:18 local, a photo taken by Oystein Lund Andersen shows a degassing following a few minutes a signal on the seismogram.

The alert level of the volcano remains at II / Waspada. VAAC Darwin issued a red aviation code on 1 June at 20:30.

VA ADVISORY
DTG: 20180601 / 2030Z
VAAC: DARWIN
VOLCANO: MERAPI 263250
PSN: S0733 E11027
AREA: INDONESIA
SUMMIT ELEV: 2968M
ADVISORY NR: 2018/37
SOURCE INFO: HIMAWARI-8
AVIATION COLOR CODE: RED
ERUPTION DETAILS: VA TO FL180 MOV N, VA TO FL130 MOV NW LAST
        OBS 01 / 1740Z
OBS VA DTG: 01 / 2030Z
OBS CLD VA: NOT IDENTIFIABLE FM SATELLITE DATA WIND
        SFC / FL180 190 / 10KT
FCST CLD VA +6 HR: 02 / 0230Z NO VA EXP
FCST CLD VA +12 HR: 02 / 0830Z NO VA EXP
FCST CLD VA +18 HR: 02 / 1430Z NO VA EXP
RMK: CURRENT SAT IMAGERY INDICATES THAT ASH FROM VOLCANO
        MERAPI HAS NOW DISSIPATED. NO REPORTS OF NEW OR ONGOING
        ERUPTION.


Sources: BPPTKG, Magma Indonesia, VAAC Darwin

Merapi - 02.06.2018 / 5:18 local - degassing - photo Oystein Lund Andersen

Merapi - 02.06.2018 / 5:18 local - degassing - photo Oystein Lund Andersen

At Kilauea, the eruption continues in the East Rift Zone.

During the night of May 31 to June 1, the lava fountains of crack 8 continued to feed the channelized lava flow to the northeast; minor overflows occurred, including at several locations near the intersection of Highway 132 and Pohoiki road. She approaches Four Corners, the crossing between Highway 132 and 137, strategic point of circulation.

The crack 18 and its associated flows are only weakly active.

Kiluaea East Rift Zone - fountains of the crack 8 on 30.05.2018 - photo Andrew Hara - Hawaii National Guard overflight

Kiluaea East Rift Zone - fountains of the crack 8 on 30.05.2018 - photo Andrew Hara - Hawaii National Guard overflight

Kiluaea East rift zone - map of cracks and active flows at 1 ° June / 10 h - Map HVO-USGS

Kiluaea East rift zone - map of cracks and active flows at 1 ° June / 10 h - Map HVO-USGS

At the top, ash emissions have declined over the past few days ... reflecting an accumulation of rubble at the base of the Overlook vent.

Radar images taken by the Italian Space Agency's Cosmo-SkyMed satellite system between 23 and 31 May 2018 / 18h HST show not only an expansion of the Overlook vent, but also the expansion of the Halema'uma'u crater itself. same, on its southeast part mainly. These changes result in rocky collapses in the top vent, which covers its rubble floor.

Kilauea - Halema'uma'u crater - Radar images taken by the Italian Space Agency's Cosmo-SkyMed satellite system between 05.17 and 31 May 2018 / 18h HST
Kilauea - Halema'uma'u crater - Radar images taken by the Italian Space Agency's Cosmo-SkyMed satellite system between 05.17 and 31 May 2018 / 18h HST

Kilauea - Halema'uma'u crater - Radar images taken by the Italian Space Agency's Cosmo-SkyMed satellite system between 05.17 and 31 May 2018 / 18h HST

On the 1st of June in the morning, the summit plume is whitish, composed mostly of vapor and gas.

Kiluaea - crater Overlook on 31.05.2018 - An aerial view of Halema'uma'u at the summit of Kīlauea Volcano captured from an Unmanned Aircraft Systems (UAS) overflight video

Kiluaea - crater Overlook on 31.05.2018 - An aerial view of Halema'uma'u at the summit of Kīlauea Volcano captured from an Unmanned Aircraft Systems (UAS) overflight video

Some features of this fissural eruption :

- The lava fountains of fissure 8 form of reticulite: an extremely delicate deposit formed of highly vesiculated (98%) and friable basaltic glass.

- Many Pelé hairs, and tears of Pelé are produced and transported remotely ... can cause irritation of the skin, mucous membranes and eyes, which should be protected.

Kilauea East rift zone - hair and tears of Pelé recovered in the rainwater recapture tank on June 1 - photos 2018.06.01 / Pele's Phoenix Twitter

Kilauea East rift zone - hair and tears of Pelé recovered in the rainwater recapture tank on June 1 - photos 2018.06.01 / Pele's Phoenix Twitter

- USGS scientists have also noted the formation of particular clouds associated with the fissure rash in the vicinity of Leilani Estates: pyrocumulus, or flammagenic clouds.

These cumulus clouds can form storms ... induced indirectly by the eruption.

Kilauea East rift zone - A pyrocumulus near the fissure 8 on 30.05.2018 -photo USGS-Facebook

Kilauea East rift zone - A pyrocumulus near the fissure 8 on 30.05.2018 -photo USGS-Facebook

- The advance of the flows on the wooded zones includes the destruction and the burial of vegetation. The combustion releases methane, which moves in the cracks of the ground, and can explode or burn with blue flames.

Source: HVO-USGS

Kilauea East rift zone - methane fires - photo Harry Durgin 27.05.2018

Kilauea East rift zone - methane fires - photo Harry Durgin 27.05.2018

At the Piton de la Fournaise, the eruption started on April 27, 2018 at 23:50 local time, stopped today at 14:30, after more than 18:30 of piston gas phase.

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 20:00 (16h UTC) on April 27th and 14h30 (10h30 UTC) on June 1st on the seismic station BOR (located at Mountain peak). (© OVPF / IPGP)

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 20:00 (16h UTC) on April 27th and 14h30 (10h30 UTC) on June 1st on the seismic station BOR (located at Mountain peak). (© OVPF / IPGP)

The transition to the backup phase is accompanied by access still prohibited to the Enclos, as justified by a statement from the Prefecture.

ACCESS TO THE ENCLOSURE PROHIBITED!

Press release of the prefecture:
Piton de la Fournaise: transition to the backup phase

June 2, 2018 at 10am

After the eruptive crisis of Friday, April 27, 2018 which led to the passage in alert level 2-2 of the specific ORSEC device of the Volcano Piton de la Fournaise, the volcanological observatory of the Piton de la Fournaise records a drop in seismicity since 14:30 yesterday. Under these conditions, the prefect of Reunion decided to move to the SAVING phase of the specific Orsec device of the Piton de la Fournaise volcano on June 2, 2018 at 10:00 am, to allow the expertises prior to a possible reopening of certain sectors to be carried out. public.

Despite the end of activity from the geophysical point of view and the stop of the feeding (end of the tremor, vibration associated with the path of the magma and the gases which it contains), an eruption remains probable in the days and hours to come up.

Consequently and pending the exploitation of the conclusions of the reconnaissance, the public access to the Fouqué enclosure, from the Pas de Bellecombe trail or from any other path, as well as the landing of aircraft in the area of ​​the volcano, remain prohibited. The Sainte-Rose Coupé Nose Trail is also closed to pedestrian traffic from the Piton Partage due to a real danger of collapse since the April 3rd eruption.

Sources: OVPF and Prefecture of Reunion

Piton of the furnace - last degassing phase on 01.06.2018 / 11h 06 UT - Camera BERT1 / OVPF

Piton of the furnace - last degassing phase on 01.06.2018 / 11h 06 UT - Camera BERT1 / OVPF

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