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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
Etna - hot spots at the summit craters and SEC flows - Sentinel-2 L2A image - bands 12,11,4 from 26.06.2021 - one click to enlarge 

Etna - hot spots at the summit craters and SEC flows - Sentinel-2 L2A image - bands 12,11,4 from 26.06.2021 - one click to enlarge 

The INGV announces that shortly after 14:30 h UTC on 26 June 2021 a resumption of strombolian activity by two eruptive vents on the South-East Crater of Etna has been observed, which is progressively intensifying, accompanied by the production of small quantities of volcanic ash.

In the previous hours, the lava flow emitted by a mouth at about 3050 m on the south-eastern flank of the South-East Crater, which remained active after the previous night's eruptive episode, has been progressively exhausted and is currently cooling.

At 14.20 hours UTC, the magnitude of the volcanic tremor is on average increasing. The last location of the tremor, at 13.45 hours UTC, is near the South-East Crater at a depth of about 3.0 km asl.

Etna SEC - Fountaining on 26.06.2021 / at 15h33 and 15h51 - webcam EMOT / INGV - one click to enlarge
Etna SEC - Fountaining on 26.06.2021 / at 15h33 and 15h51 - webcam EMOT / INGV - one click to enlarge

Etna SEC - Fountaining on 26.06.2021 / at 15h33 and 15h51 - webcam EMOT / INGV - one click to enlarge

Etna SEC - 26.06.2021 / 17h59 - new webcam LAVE

Etna SEC - 26.06.2021 / 17h59 - new webcam LAVE

At about 15:40, the strombolian activity in the South-East Crater has progressively changed to the lava fountain stage. The emission of pyroclastic material is intensifying, feeding a high eruptive cloud reaching a height of about 5 km above sea level. At the same time, a southwestward overflow of lava began, superimposed on the previous evening's eruptive episode.

Lava fountain activity ceased at around 16:50. A small ash emission from the south-east crater still persists. South-East crater, and the flow continues to extend south-west and south-east. south-south-west. A resumption of effusive activity is also observed at the mouth located at an altitude of 3050 m on the south-eastern flank of the south-eastern crater, which feeds a small lava flow of about 100 m in length.


There is a fallout of lapilli with diameters of 1-2 cm in the area of Macchia di Giarre and Zafferana Etnea, and several millimetres at Torre Archirafi (east side of Etna).

Etna SEC - 26.06.2021 / 18h59 - new webcam LAVE

Etna SEC - 26.06.2021 / 18h59 - new webcam LAVE

Etna SEC - 26.06.2021 / 20h59 - new webcam LAVE

Etna SEC - 26.06.2021 / 20h59 - new webcam LAVE

At about 20:59, strombolian activity ceased, but effusive activity continued from the mouth on the south-eastern flank of the south-eastern crater, feeding a lava flow which, at an altitude of 2900 m, split into two branches. The longer and more northerly of these branches had reached an altitude of about 2600 m at 20:00 UTC and had begun to cool; the other branch had an active front at about 2700 m.

And on the morning of the 27th, the tremor is rising ...

 

Source: INGV OE

Etna - tremor variations on 27.06.2021 / at 07h - Doc. INGV

Etna - tremor variations on 27.06.2021 / at 07h - Doc. INGV

Activity at Fagradalsfjall on 26.06.2021, from 0h to 24h, summarised in a timelapse via mbls.

 

Fagradalsfjall - Lava fields in 3D - 26.06.2021 - Doc. Náttúrufræðistofnun Íslands

 

Fagradalsfjall - 5 minute timelapse of the overview camera from midnight June 26th to midnight June 27th 2021.Check out our live camera mbls streams

Since 07:19 hours (Canary Islands time) on 25 June 2021, the Canary Islands seismic network operated by the Canary Islands Volcanic Institute (INVOLCAN) has recorded a new swarm of low-magnitude seismic events in the area of the Cumbre Vieja volcano, on the island of La Palma in the Canary Islands archipelago.

The hypocentres fall to the north of the Cumbre Vieja volcano at depths between 24 and 32 km. The maximum magnitude observed was 1.7.

In the short and medium term, no significant change in volcanic activity is expected at Cumbre Vieja, which has experienced 9 seismic swarms since 2017, including this one (1 in 2017, 1 in 2018, 5 in 2020 and 2 in 2021).

 

Source: In Volcan

 Seismic swarm on Cumbre Vieja / La Palma- in red, the earthquakes located in 2020 and 2021 in black; in blue, the previous earthquakes - Doc. 25.06.2021 InVolcan

Seismic swarm on Cumbre Vieja / La Palma- in red, the earthquakes located in 2020 and 2021 in black; in blue, the previous earthquakes - Doc. 25.06.2021 InVolcan

Cumbre Vieja volcano - photo In Volcan / fotoaereasdecanarias

Cumbre Vieja volcano - photo In Volcan / fotoaereasdecanarias

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