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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
 Pacaya - gas and ash plume from 06.02.2021 - Doc. Insivumeh

Pacaya - gas and ash plume from 06.02.2021 - Doc. Insivumeh

Pacaya - RSAM 06.02.2021 - Doc. Insivumeh

Pacaya - RSAM 06.02.2021 - Doc. Insivumeh

The activity of Pacaya has increased in recent hours.

OVPAC reports constant explosions, with the ejection of volcanic and ballistic materials at a distance of 400-500 m.

This activity is accompanied by fallout, locomotive sounds and plumes of ash that move 6 km north and northwest, a distance that can extend further over the hours.

Ash falls are reported in the areas of San Francisco de Sales, El Cedro, El Bejucal, Mesias Altas.

Effusive activity has also increased, and the lava flow divides into two arms, respectively 1,200 and 800 meters long.

 

CONRED advises that preventive evacuations are to be expected; the opinions of the municipal and departmental authorities are to be consulted. It is not recommended to find yourself in the drainages of the volcano. Self-evacuation can save lives.

 

Sources: Insivumeh special bulletin 06,02,2021 / 5:30 am local and Conred

Raung - ash plume on 07.02.2021 / 05:43 WIB - PVMBG webcam

Raung - ash plume on 07.02.2021 / 05:43 WIB - PVMBG webcam

On the island of Java, the Raung experienced this February 6 at 19:46 local an eruption, accompanied by a plume of ash at a height of at least 3,930 meters asl. , drifting east. Ash emissions continue. An orange VONA has been issued by the PVMBG.

The volcano is clearly visible on February 7. A gray plume is observed about 500-1000 meters above the summit.

Mirova detects thermal anomalies on February 6 and 7, between VRP 62 and 1544 MW (see documents below)

 

Sources: PVMBG, Magma Indonesia, VAAC Darwin

Raung - thermal anomalies at 07.02.2021 / 05h50 Doc. Mirova _MODIS - one click to enlargeRaung - thermal anomalies at 07.02.2021 / 05h50 Doc. Mirova _MODIS - one click to enlarge

Raung - thermal anomalies at 07.02.2021 / 05h50 Doc. Mirova _MODIS - one click to enlarge

The National Institute of Geophysics and Volcanology, Etna Observatory, informs that the analysis of the images of the surveillance cameras of the INGV-OE and the observations made by the INGV staff during an examination carried out in the summit area on February 5, show that Strombolian activity continues at the Southeast Crater with frequency and intensity varying over time.

On the morning of February 6, from around 04:30 UTC, an intensification of Strombolian activity at the mouths present in the eastern summit sector of the cone produced for about an hour a cloud of dilute ash which dispersed towards the 'Is. Four vents were active there almost simultaneously: see the video posted on Facebook by Boris Behncke: https://www.facebook.com/boris.behncke/videos/10224171000772164

Etna - activity of the 4 summit craters on 02.06.2021 / 09h52 - image Sentinel2 bands 4,3,2 + bands 12,11,8A via Mounts Project - one click to enlarge

Etna - activity of the 4 summit craters on 02.06.2021 / 09h52 - image Sentinel2 bands 4,3,2 + bands 12,11,8A via Mounts Project - one click to enlarge

Intense Strombolian activity also continues from several mouths present at the bottom of the Bocca Nuova crater, with a launch of equipment that also manages to exceed the edge of the crater.

Strombolian and effusive activity is observed at La Voragine Crater, which feeds a small intracrateric lava flow towards New Bocca. Intra-crater explosive activity also continues at the Northeast Crater.

Etna - 05.02.2021 - Strombolian activity at one of the mouths inside the Bocca Nuova - photo F. Ciancitto via INGV OE

Etna - 05.02.2021 - Strombolian activity at one of the mouths inside the Bocca Nuova - photo F. Ciancitto via INGV OE

Etna Bocca Nuova - 05.02.2021 - explosion with emission of ash from the western mouth - photo Francesco Ciancitto via INGV OE

Etna Bocca Nuova - 05.02.2021 - explosion with emission of ash from the western mouth - photo Francesco Ciancitto via INGV OE

The amplitude of the volcanic tremor, while remaining at high values, shows no significant variation. The localization of the source of the tremor and the intrasonic activity are also stationary.

The signals from the soil deformation monitoring stations did not undergo significant variations.

 

Sources: INGV OE & Boris Behncke

Etna - trémor at 06.02.2021 / 13:10 - Doc. INGV OE

Etna - trémor at 06.02.2021 / 13:10 - Doc. INGV OE

Etna - thermal anomalies at 02.06.2021 / 00h50 - Doc. Mirova_MODIS_logVRP

Etna - thermal anomalies at 02.06.2021 / 00h50 - Doc. Mirova_MODIS_logVRP

The Kīlauea volcano continues to erupt.

Lava activity is confined to Halemaʻumaʻu crater with lava erupting from a vent on the northwest side of the crater.

By the morning of February 6, the lava in the western, active part of Lake Halema'uma'u was about 211 m (692 feet) deep, with the eastern part of the lava lake solidifying on the surface. SO2 emission rates remain high.
As hot gases rise from the western vent of Halema'uma'u, the cooler temperatures of the atmosphere cause the water vapor to condense, creating a flammagenitus / pyrocumulus cloud over the Kīlauea lava lake .

 

Sources: HVO-USGS and Bruce Omori

Kilauea - Halema'uma'u  - flammagenitus cloud 06.02.2021 - photo  Bruce Omori / Paradise Helicopters / Extrême exposures

Kilauea - Halema'uma'u - flammagenitus cloud 06.02.2021 - photo Bruce Omori / Paradise Helicopters / Extrême exposures

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