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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 : #volcanic activity
Activity of La Fournaise, Sakurajima, Ubinas, Popocatépetl, Etna and Tangkuban Parahu 

Since 5:13 am local time on 29.07.2019 , a seismic crisis is recorded on the instruments of the Volcanological Observatory of Piton de la Fournaise. This seismic crisis is accompanied by rapid deformation. This indicates that the magma is leaving the magma reservoir and is spreading to the surface.

An eruption is likely in the near future in the next minutes or hours.

Under these conditions, the prefect decided to implement the alert phase 1 "probable eruption" of the specific device ORSEC volcano as of today at 06:00.
As a result, public access to the upper part of the Piton de la Fournaise enclosure, whether from the Pas de Bellecombe trail or from any other trail is prohibited. It is recalled that the landing of aircraft in the area of ​​the volcano is regulated and subject to authorization from the Prefecture.

To be continued ...

 

Sources; OVPF & Prefecture of Reunion

Piton de La Fournaise - seismic cris 29.07.2019 / 01-20 h UTC - Doc. OVPF

Piton de La Fournaise - seismic cris 29.07.2019 / 01-20 h UTC - Doc. OVPF

An eruptive episode occurred on July 28 at 5:25 pm, accompanied by a plume at 3,800 meters above the edge of the Sakurajima crater. The ashes, in large quantities, were carried to the northeast.

Precautionary statements are reminded when using a car, because the roads are covered and the visibility bad ... umbrellas and masks "are out"!

The VAAC Tokyo reported the ash cloud at flight altitude 160 (about 4.900 m asl) moving 15 km northeast.

 

Sources: JMA & VAAC Tokyo

Sakurajima - 28.07.2019 - Doc JMA

Sakurajima - 28.07.2019 - Doc JMA

In Peru, the CENVUL specifies the recording of thermal anomalies indicating " the presence of a lava body at the base of the crater " of Ubinas, and the increase of seismic energy (LP and hybrid earthquakes)

Explosions with expulsion of rock fragments and ashes are possible.

It should be noted that the teams of the IG Peru have installed these last days four additional stations, of high precision, in order to identify the deformations of the volcano, in connection with the rise of the magmatic fluids.

Sources: IG Peru & CENVUL

Ubinas - update of the state of the volcano on 28.07.2019 / 8 pm local - Doc. IGP / Ministerio del Ambiente / Senamhi / El Peru Primero

Ubinas - update of the state of the volcano on 28.07.2019 / 8 pm local - Doc. IGP / Ministerio del Ambiente / Senamhi / El Peru Primero

In the last 24 hours, Cenapred has identified 333 exhalations at Popocatepetl, accompanied by gas, water vapor and ashes.

Eight explosions are recorded: July 27 at 11:14 and 14:50, and July 28 at 0:09, 6:03, 7:59, 8:11, 8:50, and 8:55. The ashes disperse in a northwesterly direction. Nighttime glow is observed in the crater.

The seismicity is marked by 211 minutes of harmonic tremor.

An overflight of Popocatepetl on 27 July by the UNAM CNPC and Cenapred teams, with the support of the Guardia Nacional, revealed the destruction of dome # 83 by previous explosions with ash emissions; the thermal photographs and images made it possible to determine that the internal crater retains its dimensions (70 meters in diameter and 15 meters in depth).

The volcanic alert remains at Amarillo fase 2.

 

Source: Cenapred

Popocatépetl - 27.07.2019 - disappearance of the dome # 83 and ash emission - photos Cenapred / CNPC
Popocatépetl - 27.07.2019 - disappearance of the dome # 83 and ash emission - photos Cenapred / CNPC

Popocatépetl - 27.07.2019 - disappearance of the dome # 83 and ash emission - photos Cenapred / CNPC

Popocatépetl - explosion and plume of 28.07.2019 at 8:54 - WebcamsdeMexico

Popocatépetl - explosion and plume of 28.07.2019 at 8:54 - WebcamsdeMexico

Some images of the Sentinel satellites, captioned by the INGVvulcani, make it possible to distinguish the Etna summit structures involved in the recent activity, the lava flows and the plume of the early times and the sulfur dioxide emissions towards Albania.

 

Sources: INGVvulcani & Copernicus various satellites.

Etna - Lava flows and ash plume of 27.07.2019 - image Sentinel-2 L1C image IR bands 8,4,3

Etna - Lava flows and ash plume of 27.07.2019 - image Sentinel-2 L1C image IR bands 8,4,3

Etna - 27.07.2019 / 10h UTC / 12h local - image Sentinel 2 / Copernicus - INGVvulcani

Etna - 27.07.2019 / 10h UTC / 12h local - image Sentinel 2 / Copernicus - INGVvulcani

Etna - sulfur dioxide plume on 28.07.2019 - image Sentinel 3 SLSTR & Sentinel 5P / Copernicus

Etna - sulfur dioxide plume on 28.07.2019 - image Sentinel 3 SLSTR & Sentinel 5P / Copernicus

Excellent images of Klaus Dorschfeldt summarizing the activity of etna 27.07.2019

The situation calmed down in Tangkuban Parahu after the phreatic eruption of July 26 / 3:48 pm.

The amplitude of the tremor decreased from 12-20 mm on the 1st day, to 2-12 mm on the second, and 1-1.5 mm on 28th July.

In addition, vibrations are continuously recorded so that the safety zone of 500 meters around the point of eruption and crater lips is maintained.

The ash removal work is going on.

 

Source: PVMBG, BNPB

  Tangkuban Parahu - state of the crater 28.07.2019 / at 15:15 WIB. - photo BNPB

  Tangkuban Parahu - state of the crater 28.07.2019 / at 15:15 WIB. - photo BNPB

Tangkuban Parahu - lowering of seismic parameters (far right of the table - Doc Magma Indonesia

Tangkuban Parahu - lowering of seismic parameters (far right of the table - Doc Magma Indonesia

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