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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 eruptive activity of Veniaminof has not changed much in the previous days, but has been clarified by an image of the Landsat 8 satellite taken on September 9, 2018.

One can see a lava flow, about 800 meters long on the southern flank of the intracaldeira cone, and a triangular zone of ash deposits on the snow.

This activity is corroborated by a visual observation of fountaining and lava flow on September 10 by observers aboard the Alaska State Tustumena Ferry.

Alert levels and aviation code remain unchanged: Watch / Orange

Source: AVO

Veniaminof - lava flow and ash deposit on the snow on the top of the cone intracaldeira - Landsat photo 8 / 09.09.2018 / AVO / Chris Waythomas

Veniaminof - lava flow and ash deposit on the snow on the top of the cone intracaldeira - Landsat photo 8 / 09.09.2018 / AVO / Chris Waythomas

An explosion occurred on September 10 at 23:25 Z at Karymsky. She produced a plume of ash amounting to 4,000-5,000 meters asl. before drifting north-east over 290 km.

The KVERT reports that moderate eruptive activity continues, which may affect aviation.

Sources: KVERT & VAAC Tokyo

 Karymsky - Volcanoc Ash Advisory 11.09.2018 by VAAC Tokyo

Karymsky - Volcanoc Ash Advisory 11.09.2018 by VAAC Tokyo

 Karymsky - plume of 28.07.2018 - photo N. Balakhontseva / KVERT

Karymsky - plume of 28.07.2018 - photo N. Balakhontseva / KVERT

An eruption is reported on September 10 at 12:10 local by Geoffroy Avard of the Ovsicori at Turrialba; it was accompanied by a column at 300 meters above the crater (not visible on the webcam) emitted passively and containing diluted ash.

The activity continued during the day with emissions of vapors and gases, and in the evening and night, by incandescence due to high temperature gas emissions.

Source: Ovsicori Communication and Webcam

Turrialba - activity from 10.09.2018 respectively at 12:17 and 16:38 - Webcam Ovsicori
Turrialba - activity from 10.09.2018 respectively at 12:17 and 16:38 - Webcam Ovsicori

Turrialba - activity from 10.09.2018 respectively at 12:17 and 16:38 - Webcam Ovsicori

The seismicity of Anak Krakatau was marked on September 10 by a continuous tremor of dominant amplitude at 50 mm. The activity could not be illustrated due to fog and low winds on the volcano.

On a screen of the Sentinel 2 SWIR satellite, one can observe a lava flow towards the sea, which is quite wide and warm.

Sources: PVMBG & Sentinel 2

Anak Krakatau - seismicity on 10.09.2018 - last few days marked by tremor - Doc.Magma Indonesia

Anak Krakatau - seismicity on 10.09.2018 - last few days marked by tremor - Doc.Magma Indonesia

Anak Krakatau - activity from 10.09.2018 - image Sentinel 2 SWIR - one click to enlarge.

Anak Krakatau - activity from 10.09.2018 - image Sentinel 2 SWIR - one click to enlarge.

At Kilauea, the cone on fissure 8 has been characterized in recent days by a small collapse pit on the floor, which produces an incandescence due to the presence of hot materials beneath the surface. There is no reported lava flow associated with its creation.

The settings remain low.

Small collapses also mark the crater of Pu'u O'o, accompanied by brown plumes.

Source: HVO-USGS

Kilauea East rift zone - evolution of the cone on fissure 8 - video about this link: https://volcanoes.usgs.gov/observatories/hvo/multimedia_uploads/multimediaFile-2627.mp4

Kilauea East rift zone - evolution of the cone on fissure 8 - video about this link: https://volcanoes.usgs.gov/observatories/hvo/multimedia_uploads/multimediaFile-2627.mp4

Kilauea - plume of brown ash from a collapse in the crater of Pu'u O'o 08.09.2018 / 10h29 - webcam HVO-USGS

Kilauea - plume of brown ash from a collapse in the crater of Pu'u O'o 08.09.2018 / 10h29 - webcam HVO-USGS

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