From ~ 07:00 UTC on November 25, 2021, a modest lava overflow is observed, on webcams, from the northern area of the crater terrace of Stromboli; it remains for the moment confined to the summit area at an altitude of about 750 meters above sea level.
For the moment, the lava flow remains limited in the upper part of the Sciara del Fuoco and the lava blocks break off from the front, and roll along the Sciara del Fuoco to the coast. Ordinary Strombolian activity persists in the north and south-central crater areas.
From a seismic point of view, the volcanic tremor remains at average levels with weak oscillations.
Regarding the deformations of the ground during the last hours, no significant change in the signals was evidenced.
Stromboli - activity from 25-26.11.2021 - therm webcam SCT / INGV OE - one click to enlarge the thumbnails
In the evening, the INGV reports that the lava overflow from the northern area of the terrace of the Stromboli crater still seems to be fed. The front of the lava flow, which rises in the upper part of the Sciara del Fuoco, breaks and causes boulder rolls along the Sciara del Fuoco.
Finally, ordinary Strombolian activity persists both in the areas of the north and south-central crater; from the start of the overflow phenomenon there was a decrease in the intensity and frequency of the explosions compared to what
observed during the week.
The volcanic tremor did not show significant changes while maintaining the amplitude values in the mean.
There are no significant changes in tilt and GPS signals.
Source: INGV OE
In La Palma, the intense eruptive activity continues: we observe a high lava fountain and again overflow today at 9:08 am at CumbreVieja
One of the volcano's mouths began to expel lava effusively, which may have increased the flow of lava flows and formed a new one in the southern area surrounding the Montaña Cogote, which until now had served as a stop towards the south; it passes at 12:15 pm through the cemetery of Las Manchas, which it swallows up, and destroys a photovoltaic station
La Palma - thermal and RGB flight on 25.11.2021 at 7:30 am; the flows move towards the Montaña de Todoque and regroup in its eastern zone, which receives a significant influx of lava - IGME video
Around 5 p.m. local, INVOLCAN confirms the appearance of a new emission center south of the main cone. Lava moves at 600 meters per hour.
The technical director of the Special Plan for the Protection against the Volcanic Risk of the Canary Islands (Pevolca), Miguel Ángel Morcuende, claimed that the new flow emerged early this morning and is taking place in parallel with the tenth.
Scientists and technicians monitor this flow because "it is worrying" because it begins to penetrate in an area of strong slope, and in fact its trajectory will be the subject of a meeting.
La Palma - new emission center and rapid flows on 25.11.2021 / 5 p.m. - Doc. IGME
At 8:15 p.m., InVolcan reported a powerful jet observed in the main mouth and a lava fountain in one of the lower vents.
During the night, the flow moved at high speed. The temperature measured in the lava is 1024 ° C.
An additional danger comes to be grafted with the rains on La Palma: the accumulation of ash and pyroclasts mixed with the water can generate the formation of mudslides with an enormous mechanical force (small lahars) in the areas of strong runoff.
Sources: IGN, IGME, InVolcan, RTVC, DSN