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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
 Stromboli at nightfall on September 2, 2020, activity seen from the north ridge of Sciara del Feu at about 700 m. The photos were taken by Alessandro Gattuso (INGV-Palermo).

Stromboli at nightfall on September 2, 2020, activity seen from the north ridge of Sciara del Feu at about 700 m. The photos were taken by Alessandro Gattuso (INGV-Palermo).

Referring to the observations made by INGV-OE staff during the Stromboli inspection on August 22, the morpho-structural arrangement of the crater terrace consists of three eruptive vents located in the area of ​​the North crater and by at least three eruptive vents located in the Center-South crater area. All the vents are placed inside the depression which occupies the crater terrace.

In the area of ​​the north crater, the N1 crater, with three emission points, produced explosions of low to high intensity (the products of some explosions exceeded 200 m in height) of coarse materials (lapilli and bombs) which are fallen profusely with a radial distribution.

The mouth N2 showed a low intensity explosive activity (less than 80 m in height) of coarse material. The average frequency of the explosions varied from 3 to 10 events / h.

In the Central-south zone, the explosions were mainly of fine materials, mixed with coarser ones, of medium-high intensity (the products emitted often exceeded 250 m in height). The frequency of the explosions varied from 2 to 8 events / h

 

Source: INGV OE

Stromboli at nightfall on September 2, 2020, activity seen from the north ridge of Sciara del Feu at about 700 m. The photos were taken by Alessandro Gattuso (INGV-Palermo).

Stromboli at nightfall on September 2, 2020, activity seen from the north ridge of Sciara del Feu at about 700 m. The photos were taken by Alessandro Gattuso (INGV-Palermo).

In Guatemala, currently under the effects of the storm Nana, the activity of the Fuego remains marked by explosions, which generate avalanches of blocks in the direction of the various drainages, which for some reach the limit of the vegetation; the ash plumes that accompany them cause only small fallout of ash and shock waves perceptible up to 8 km from the volcano.

Note that the lava flow in the Ceniza barranca is no longer active.

 

Sources: Insivumeh and Crelosa

Fuego / Guatemala - series of explosions of 3 September 2020 - Doc. IDIS / epcom / Crelosa - via Volcano YT

The activity of Sakurajima, on the island of Honshu, continues with this September 4, 2020 at 12:27 p.m. an explosion, accompanied by a plume of gas and ash rising to 1,600 meters above the summit; the dissipation took place in the direction of a northern sector.

 

Source: JMA

Sakurajima - activity between 9:05 am and 9:18 am on 04.09.2020 - Webcam and dispersion map JMA

Sakurajima - activity between 9:05 am and 9:18 am on 04.09.2020 - Webcam and dispersion map JMA

The explosive eruptive activity continues to mark Suwanosejima, in the Ryukyu Islands; it is characterized by almost constant ash emissions between 1,300 and 1,800 meters dissipating towards the northeast on September 3.

The rise of fresh magma within the volcano is deduced from an incandescence and these constant ash emissions.

 

Sources: JMA

 Suwanosejima - 09/03/2020 / 8:52 p.m. - JMA webcam

Suwanosejima - 09/03/2020 / 8:52 p.m. - JMA webcam

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