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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
Merapi - photo Oystein Lund Andersen 20.08.2022 - one click to enlarge

Merapi - photo Oystein Lund Andersen 20.08.2022 - one click to enlarge

This week, 13 lava avalanches were observed at Merapi, in a dominant southwest direction towards the Bebeng River with a maximum slip distance of 2,000 m.
A growth of the southwest dome is observed, the volume of the dome is calculated at 1,624,000 m³. As for the central dome, it is estimated at 2,772,000 m³.
The intensity of the earthquakes is still quite high this week. Many VT earthquakes indicate magmatic activity at a depth of >1.5 km from the summit. Mount Merapi's deformation, which was monitored using EDM this week, showed a distance shortening rate of 0.4 cm/day.

Merapi - seismicity and deformation from 08.25 to 09.01.2022 - Doc. BPPTKG

Merapi - seismicity and deformation from 08.25 to 09.01.2022 - Doc. BPPTKG

Activity level remains at 3/siaga
The current potential danger is in the form of lava avalanches and hot clouds in the south-southwest sector covering the Boyong River for a maximum of 5 km, Bedog River, Krasak, Bebeng for a maximum of 7 km . The southeastern sector covers the Woro River for a maximum of 3 km and the Gendol River for a maximum of 5 km. Meanwhile, the ejection of volcanic material in the event of an explosive eruption may reach a radius of 3 km from the Mountain peak.

 

Source: BPPTKG - Merapi activity report from August 26 to September 1, 2022

Volcanic island of Ofu island (Samoa) -photo © Adobe Stock / via IPGP

Volcanic island of Ofu island (Samoa) -photo © Adobe Stock / via IPGP

The earthquake swarm linked to the island of Taʻū, Samoa, continues without significant change in the past 24 hours.

Data shows that the earthquake swarm is occurring in a fixed position, but the precise location has been difficult to determine. Preliminary estimates include a narrow band of possible locations from about 30 km (19 mi) below the north central coast of Taʻū Island to an area about 5 km (3 mi) below the ocean surface 20 km (13 mi) north of Taʻū Island. Seismologists continue to review data and refine locations.

In the past 24 hours, the USGS Seismic Network has detected 21 earthquakes large enough to be felt by residents of the Manuʻa Islands. The largest event on September 2 was a magnitude of 3.4. Numerous small earthquakes undetectable by humans also continue. The American Samoa Emergency Operations Center continues to receive reports of felt earthquakes and booming noises.

No volcanic activity was observed in available satellite data for the previous 24 hours.

The current Volcanic Alert Level: Advisory, and the current Aviation Color Code: Yellow

 

Source: USGS - September 4, 2022, 02:10 UTC

The Maurice and Katia Krafft exhibition at the volcano city - photo Région Réunion 03.09.2022 / Imazpress

The Maurice and Katia Krafft exhibition at the volcano city - photo Région Réunion 03.09.2022 / Imazpress

An exhibition to be discovered at the Cité du Volcan, on the island of Reunion, to live or relive a passion of Maurice and Katia Krafft in the conquest of knowledge of the volcanoes of our world, and carried away in 1991 by a fiery cloud of the eruption of Mount Unzen in Japan.

 "Maurice and Katia KRAFFT - 30 years already!"

The designers and directors of this exhibition, which aims to be immersive, lift the veil in an article on Imazpress.

 

Source: Imazpress

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