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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

At Agung, December 14th's seismicity remains in the norm of the preceding days, with 3 VA volcanic earthquakes, 4 VB volcanic earthquakes, 32 emission earthquakes and a continuous tremor of dominant amplitude at 1 mm.

The plumes reach about 1,500 meters above the summit whatever their nature; nocturnal glow is observed. Ash emissions are expected to remain in the near vicinity of the volcano, according to VAAC Darwin.

Gunung Agung on 15.12.2017 / 8h13 - photo Indo Gazoz / Twitter

Gunung Agung on 15.12.2017 / 8h13 - photo Indo Gazoz / Twitter

Agung - Volcanic ash adivisory 15.12.2017 - VAAC Darwin IDD65305

Agung - Volcanic ash adivisory 15.12.2017 - VAAC Darwin IDD65305

An overflight by drone, made this December 14 at 16h WITA, does not bring much additional information on the "lava cake", the definition of the images not being comparable to that of the photos taken on site.

The PVMBG states that the ratio of magma emitted has decreased since the end of November, and only 1/3 of the crater is filled with lava.

Sources: PVMBG, BNPB, Magma Indonesia, VAAC Darwin.

Agung - flying over the crater by a drone 14.12.2017 / 16h WiTA - from video PVMBG

Agung - flying over the crater by a drone 14.12.2017 / 16h WiTA - from video PVMBG

In Sinabung, seismicity recorded 3 eruptions on 14 December and 28 avalanche events.

Source: PVMBG

Sinabung - activity from 13.12.2017 / 08h03 am - photo Berastagi Nachelle Homestay

Sinabung - activity from 13.12.2017 / 08h03 am - photo Berastagi Nachelle Homestay

At Merapi / Java, two hikers who had lost their way due to bad weather, were found unharmed by the SAR teams, and evacuated.

The BNPB reports on this occasion that the volcanic activity of the volcano remains normal, without increase in seismicity, or chemical parameters and deformation.

Source: BNPB & BPPTKG

Merapi - 11.12.2017 / 16h40 - photo BPPTKG

Merapi - 11.12.2017 / 16h40 - photo BPPTKG

On the morning of December 14, the explosive activity of the Fuego increased, characterized by constant explosions of vulcanian type, strongly generating ash. The ash plume reaches 4,500-5,000 meters asl., Moving for 15 km towards NW, N and NE. Ash falls are reported on San Miguel Duenas, Alotengango, and Ciudad Vieja, with opportunities to reach Antigua Guatemala and Chimaltenango.

Sources: Insivumeh & Conred

Fuego - direction of the ash plume on 14.12.2017 - Local Insivumeh report of 10.40am

Fuego - direction of the ash plume on 14.12.2017 - Local Insivumeh report of 10.40am

Kanlaon, still on alert level 2, has presented 1,217 volcanic earthquakes in the past 24 hours. Sulfur dioxide flux was measured at 687 tonnes / day on December 13th.

The summit crater is surmounted by emissions of white plumes of steam.

This instability of the volcano is to follow.

Source: Phivolcs
 

The summit craters of Kanlaon

The summit craters of Kanlaon

News from Erta Ale by Sylvain Chernette / 80 jours Voyages, which went through the pit crater, with a very agitated summit lava lake and morphology, before continuing towards the new active zone on the flank of the volcano; he reports three lava lakes more or less connected.

The last Sentinel2 image dated December 10 illustrates a strong outgassing of the caldera pit crater and thermal activity at the lava zone on the flank and in the northeast lava field.

Sources: Sylvain Chermette / 80 days Travels & Sentinel2

Erta Ale - rootless lava lake crossed by the stream - photo Sylvain Chermette December 2017

Erta Ale - rootless lava lake crossed by the stream - photo Sylvain Chermette December 2017

Erta Alé 2017: Observation of the summit lava lake at night during the "80 Jours Voyages" in December.

  Erta Ale - 12.10.2017 -  image Sentinel-2 SWIR, Cloud coverage 34

Erta Ale - 12.10.2017 - image Sentinel-2 SWIR, Cloud coverage 34

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