Stromboli Volcano, Fuego, Popocatépetl, Krakatau, Semeru, …

The lava flow on Stromboli’s Sciara del Fuoco last evening

The lava flow brightens emissions of gas and steam (image: ilvulcanoapiedi.it)

Satellite image of Krakatau volcano on 25 Jan 2023

Satellite image of Semeru volcano on 24 Jan 2023

Thermal F1 image of both active lava lakes within Halemaʻumaʻu crater with small lava pit in between them (image: F1 HVO)

Stromboli (Eolian Islands, Italy): (25 Jan) The lava flow seems to have decreased over night although probably remains active in the upper part of the Sciara del Fuoco.
After our recent Etna special tour, Tom decided to visit Stromboli island on his way home. At 3.30, while the ferry was at neighboring Panarea island, a large brownish ash plume could be seen rising from the area of the Sciara del Fuoco on Stromboli island in the distance, a tell-tale sign that a landslide had occurred, which was the case, as a result or trigger, or both, of a magma surge leading to the new lava overflow.
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Last night, the activity was very impressive to observe: A well-fed flow emerged from a breach in the northern crater rim, then split into two arms, one of which formed a broad lava fall over a cliff about 50 m from the vent. Below this area, the lava formed 3 parallel arms that entered a gully (formed by previous landslides), hiding the flow from direct view.

Judging from the glow, the lava flow front reached a few hundred meters below the crater area. Occasional glowing rockfalls descended to near the coast.

…25 Jan:
A new lava flow started to emerge from the North crater terrace at about 14:20 local time yesterday.
As informed our founder and volcanologist Dr. Tom Pfeiffer, on his way to Stromboli, it’s been seen a larger dust plume rising from the Sciara del Fuoco, as seen from the hydrofoil in Panarea likely this was a collapse event that breached the crater, allowing the lava to overflow at 15:30 local time.
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The event was accompanied by a typical steep rise of volcanic tremor, registered at 14:19 local time, indicating magma moving upwards through the volcanic conduits and later on, it decreased again to medium-low values.

Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20230125/1519Z OVER FL080 EXTD SE OBS VA DTG:25/1520Z

Krakatau (Sunda Strait, Indonesia): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: ERUPTION AT THE VOLCANO OCCURED AT 25/1400Z

Semeru (East Java, Indonesia): (24 Jan) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: VA TO FL140 OBS AT 24/2150Z EST VA DTG:24/2150Z to 14000 ft (4300 m)

Kilauea (Hawai’i): (25 Jan) The effusive eruption at the volcano continues.
Both lava lakes, the large one in the eastern half of the crater and 2021-2022 western, smaller one, continue to be active within the Halemaʻumaʻu crater.
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The eastern lava lake is currently well-defined by its levee boundaries, though there are periods of frequent overflows.
The flux of SO2 emissions reached to a 3,000 tonnes on 20 January.

Popocatépetl (Central Mexico): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 18000 ft (5500 m) altitude or flight level 180 and is moving at 20 kts in NE direction.
The full report is as follows: VA EMS OBS to 18000 ft (5500 m)

Fuego (Guatemala): (24 Jan) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA NOT SEEN IN SAT

Nevado del Ruiz (Colombia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 .
The full report is as follows: VA EMS OBS to 20000 ft (6100 m)

Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 27000 ft (8200 m) altitude or flight level 270 and is moving at 10 kts in W direction.
The full report is as follows: INTERMITTENT EMISSIONS to 27000 ft (8200 m)

Volcano Activity Summary for 25 Jan 2023: