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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

The monitoring parameters of the seismic and acoustic stations around the Fuego volcano show an increase which translates into greater degassing and incandescence observed in the crater, since the early hours of July 28.

This beautiful activity is reported by our friend Pippo Scarpinati, from Finca Montserrat, about 4 km away as the crow flies on July 28 between 3 and 7 am.

Fuego - night activity on 28.07.2022 - photo © Pippo Scarpinati - one click to enlarge

Fuego - night activity on 28.07.2022 - photo © Pippo Scarpinati - one click to enlarge

Fuego - night activity on 28.07.2022 - photo © Pippo Scarpinati - one click to enlarge

Fuego - night activity on 28.07.2022 - photo © Pippo Scarpinati - one click to enlarge

It has been gradually observed that low sounds similar to those of a train locomotive machine predominate for periods longer than 30 minutes. This increase allowed the formation of a lava flow of about 300 meters in length towards the Ceniza ravine, constantly causing avalanches of moderate characteristics in the same direction. These could cover distances close to 2 km long, with the probability of reaching the top of the hill known as "El Cucurucho".

Curtains of ash several tens of meters high can be generated from said ravine and then be dispersed over several kilometers by the wind, which would favor the constant fall of fine ash in the communes of the south-west, south and south flank. -is. this activity continues to increase and is generating new lava flows in other directions, violent ash-laden explosions, and moderate to strong avalanches to more ravines, such as Santa Teresa and Las Lajas.

Fuego - 28.07.2022 - explosion and rolling of incandescent blocks at daybreak - photo © Pippo Scarpinati - one click to enlarge

Fuego - 28.07.2022 - explosion and rolling of incandescent blocks at daybreak - photo © Pippo Scarpinati - one click to enlarge

The length of the flow reached 700 meters on July 29, generating strong avalanches towards the barranca Ceniza, and a plume of up to 4,800 m. asl.

 

Sources: Special bulletin #063-2022, daily bulletin of 29.07 & thanks for sharing this photos by Pippo Scarpinati

 Merapi - summit domes on 28.07.2022 - Doc. BPPTKG

 Merapi - summit domes on 28.07.2022 - Doc. BPPTKG

During the week of July 22 to 28, 2022, the activity of Merapi, on Java, was marked by 47 lava avalanches towards the southwest, mainly to the Bebeng river, moving 1,800 m. max.

Growth of the southwest and middle domes has resumed. The volume of the southwest lava dome is 1,672,000 m³ and that of the central dome is 2,796,000 m³.

Seismicity remained elevated. Deformation monitored by EDM showed no significant change.

Merapi - seismicity and deformation from July 22 to 28, 2022 - Doc. BPPTKG

The 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 southeast sector covers the Woro River for a maximum of 3 km and the Gendol River for a maximum of 5 km. Explosions can scatter materials within 3 km of the summit.

 

Sources: BPPTKG, Magma Indonesia

Reventador - 2022.07.29 / 12:42 UTC - IGEPN webcam

Reventador - 2022.07.29 / 12:42 UTC - IGEPN webcam

At Reventador, in Ecuador, the IGEPN reports moderate surface and internal activity levels, however on the rise on the surface for July 29 / 11 a.m.

Seismicity is characterized by: 38 explosion earthquakes, 62 Long Period (LP) earthquakes, 11 emission tremor periods.

In the morning, several gas emissions with ash were recorded with heights up to 1,000 meters in a northwest direction, in addition the Washington VAAC reported an emission of 688 m above the level of the le summit in a westerly direction.

FIRMS recorded 7 thermal alerts at Reventador in the last 24 hours while MIROVA recorded 2 alerts, respectively of 34 and 37 MW.

During the night, an incandescence could be observed in the crater and a rolling of blocks 500 meters below the level of the summit. A new lava pulse is emitted from the northeast flank of the volcano.

 

Source: IGEPN

On 2022-07-28 TROPOMI detected an enhanced SO2 signal of 4.85 DU at a distance of 3.7 km from Karymsky. Other nearby SO2 sources: Avachinsky, Kizimen and Mutnovsky – Doc. Sentinel-5P Tropomi / DLR / BIRA / ESA - one click to enlarge

On 2022-07-28 TROPOMI detected an enhanced SO2 signal of 4.85 DU at a distance of 3.7 km from Karymsky. Other nearby SO2 sources: Avachinsky, Kizimen and Mutnovsky – Doc. Sentinel-5P Tropomi / DLR / BIRA / ESA - one click to enlarge

At Karymsky, moderate explosive activity was reported by KVERT on July 29 with an ash plume at 3,500-4,000 m. drifting 43 km to the southeast of the volcano.

This activity, which continues, could generate ash explosions at more than 12,000 m. asl at any time and affect air traffic.

The aviation code remains orange.

 

Source: KVERT

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