Overblog
Editer l'article Suivre ce blog Administration + Créer mon blog

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
Stromboli - collapse of the lava front which takes the materials to the sea - photo 10.10.2022 / INGV OE - one click to enlarge

Stromboli - collapse of the lava front which takes the materials to the sea - photo 10.10.2022 / INGV OE - one click to enlarge

Field observations in Stromboli, carried out by INGV staff in the evening, show that the eruptive scenario described in the previous press release remains almost unchanged. Indeed, the lava flows continue to be poorly fed and the fronts have not advanced, settling at about 400 m altitude. Frequent collapses and detachments of material from the lava channel eroded by the flows and from the front itself which quickly reach the sea continue to be observed.

From the sea, the INGV teams observed the morphological changes of the Sciara del Fuoco, in which a fairly large incision was formed which carries a large part of the pyroclastic material emitted and that eroded from the crater area and from the slope.

Stromboli - erosion scar in the Sciara del Fuoco - photo 10.10.2022 / INGV OE - one click to enlarge

Stromboli - erosion scar in the Sciara del Fuoco - photo 10.10.2022 / INGV OE - one click to enlarge

Stromboli - pyroclastic flow in the Sciara del fuoco on 10.10.2022 - INGV OE - one click to enlarge

Stromboli - pyroclastic flow in the Sciara del fuoco on 10.10.2022 - INGV OE - one click to enlarge

From the seismic point of view, during the last hours, the average amplitude of the volcanic tremor has shown various fluctuations in the medium-low and medium-high levels and is currently located in the medium-low level.
Compared to the last update announcement, the signal from the Timpone del Fuoco clinometer station recorded a variation beginning around 2:30 p.m. GMT which gradually accumulated by about 0.2 microdadians at 3:30 p.m. GMT and then returned to the point departure.

 

Source: INGV OE

Villarica - incandescence at the bottom of the crater on 10.10.2022 / 04:47 - POVI webcam

Villarica - incandescence at the bottom of the crater on 10.10.2022 / 04:47 - POVI webcam

A sudden increase in magmatic activity was observed at the bottom of the crater of Villarica, Chile, on October 10, by the POVI webcam.

Simultaneously, a MODIS-NASA satellite (MIROVA) measured a thermal anomaly of VRP 4 MW, the highest level since January 2021. No expulsion of incandescent material was observed by the webcams.

 

Source: P.O.V.I. & MIROVA

Home Reef - VOLCAT records 14 volcanic eruptions (red dots) in the past 48 hours. - Doc. via TGS - one click to enlarge

Home Reef - VOLCAT records 14 volcanic eruptions (red dots) in the past 48 hours. - Doc. via TGS - one click to enlarge

It has been a month since the effusive eruption began at Home Reef, in the Tonga Islands.

The latest satellite images reveal its measurements on October 5: 268 m. north-south, 283 m. east-west, for an area of ​​approximately 15 acres and an estimated height of 15 to 18 m. above sea level.
The island has steep headlands on its eastern half, gentler western side.

The volcanic plume has diminished and emissions from vents located to the SW and NNE have reduced to the kilometer around the island.
Activity over the past 48 hours is made up of 14 eruptive episodes.

A marine risk zone remains fixed at 4 km. of Home Reef, and the aviation code remains Orange.

 

Source: Tonga Geological Services #29 / 10.10.2022

Grimsvötn - vertical displacement of the GVTH station on 10.10.2022 / 7:59 p.m. GPST - Doc. Univ.of Iceland Institute of Earth Science via K. Jonsdottir

Grimsvötn - vertical displacement of the GVTH station on 10.10.2022 / 7:59 p.m. GPST - Doc. Univ.of Iceland Institute of Earth Science via K. Jonsdottir

Measurements made by IES / Univ.iceland show that the level of Lake Grímsvötn (Vatnajökull glacier) is falling, signifying the start of a glacial flood. A small flood in the Gígjukvísl river is expected on October 11. Although unlikely, it cannot be ruled out that an eruption could follow.

 

Source: Kristín Jónsdóttir / IMO

Grimsvötn - photo archives Icelandic coast guards 10.2020 - one click to enlarge

Grimsvötn - photo archives Icelandic coast guards 10.2020 - one click to enlarge

Commenter cet article

Archives

Articles récents

Hébergé par Overblog