Grímsvötn (Iceland): The glacial flood (jökulhlaup) from Grímsvötn volcano has started. Meltwater has made its way under the glacier to its exit at the Gígjukvísl outlet river, whose water levels are now quickly increasing and were at approx. 1200 cubic meters per second earlier today. Scientists expect the flood to go on for days and reach its maximum in 4-6 days at values of around 4,000 cubic meters per second.
The modeled water discharge rate to release a total of about 1 cubic kilometer can be seen in this embedded graph:
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Ég er að leita að sirka 100.000.000.000 lítrum af hlaupvatni, gætu verið stödd einhversstaðar í Vatnajökli. #jarðfræðitwitter pic.twitter.com/84UKVn7F7a
— Einar Sindri (@eolafs) November 29, 2021
Worries the flood might trigger volcanic eruption
La Palma (Canary Islands (Spain)): After the surge of magma during the past days, the activity has now dropped again significantly, but there is a new signal of ground uplift, which suggests that a new batch of magma is on the rise and currently being stored and likely to come out as a new surge probably in the next days… There is certainly no sign of the eruption ending soon.
Even if it has been gradually decreasing today, the explosive and effusive activity from the new (as well, to a lesser extent from the old) vents are continuing. Volcanic tremor remains comparably high and has strong temporary peaks, indicating magma flux remains significant.
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…2 Dec:
Last night, activity increased and to sustained lava fountains from the main vent of the new vent system on the northeastern side of the cone:
Fuerte actividad estromboliana a las 18:25 hora canaria / Strong strombolian activity at 18:25 canarian time pic.twitter.com/a9Kj2i0dvo
— INVOLCAN (@involcan) December 1, 2021
Sakurajima (Kyushu, Japan): (2 Dec) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20211202/0802Z FL080 EXTD SE OBS VA DTG:02/0750Z
Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20211202/1401Z FL070 EXTD E OBS VA DTG:02/1400Z
Ulawun (New Britain, Papua New Guinea): The alert level for the volcano was raised to „orange“, as an increased seismic activity has been felt by local observers on 30 November.
Volcanic Ash Advisory Center Darwin (VAAC) raised the alert level based on gas, steam and small amounts of ash on 29 November.
Semeru (East Java, Indonesia): (1 Dec) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: GROUND REPORT OF ERUPTION WITH VA TO FL130 OBS VA DTG:01/2140Z
Fuego (Guatemala): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EMS HAVE DISP IN STLT IMAGERY
Nevado del Ruiz (Colombia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 21000 ft (6400 m) altitude or flight level 210 .
The full report is as follows: VA EMS OBS IN STLT AND SUMMIT WEBCAM to 21000 ft (6400 m)
Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 23000 ft (7000 m) altitude or flight level 230 .
The full report is as follows: VA CLDS OBS IN SUMMIT WEBCAM to 23000 ft (7000 m)
Reventador (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: VA CLDS OBS IN STLT AND SUMMIT WEBCAM to 15000 ft (4600 m)
Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 26000 ft (7900 m) altitude or flight level 260 .
The full report is as follows: INTERMITTENT EMISSIONS to 26000 ft (7900 m)
Nevados de Chillán (Central Chile): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: UNABLE TO DETECT
