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Karangetang volcano (Api Siau Island, northern Indonesia): hot avalanches start to form

Sun, 26 Feb 2023, 16:04 16:04 PM | BY: T
Small pyroclastic flow on Karangetang volcano yesterday (image: PVMBG)
Small pyroclastic flow on Karangetang volcano yesterday (image: PVMBG)
The volcano started to generate pyroclastic flows on its southeastern side. These are turbulent avalanches of hot lava material mixed with hot gas and air. The likely cause for their formation was that some of the fresh lava emplaced on the steep slope beneath the southern summit crater became unstable and collapsed.
This process is rather typical for Karangetang's eruptions and extremely dangerous. So far, there were at least two such avalanches reported during yesterday, and they have been relatively small reaching lengths of approx. 1 km only. As the eruption continues, they could become larger and reach inhabited areas in their paths that should now be evacuated as a precaution.
Our expedition leader Andi is on location and furthermore reported that he felt numerous earthquakes, and other contact in the region also have been noticing increases seismic activity around the Molucca and Celebes Sea area. Since the large magnitude 6.8 quake Friday morning (local time) deep under the Molucca Sea, many smaller ones have rattled the area, including several magnitude 4 events every day.
There are at least 3 erupting volcanoes right now here: Karangetang, Ibu and Dukono, both on neighboring Halmahera island to the east. Awu volcano to the south on Sulawesi is on yellow alert and has been showing signs that magma might be accumulating underneath its surface. It cannot be rules out that the recent seismic activity has increased the activity of nearby volcanoes.

Previous news

Sat, 25 Feb 2023, 17:57

Karangetang volcano (Api Siau Island, northern Indonesia): actively growing new lava dome, field report

Two active craters and travelling hot rock falls toward the base of the volcano (image: Andi Volcanist/VolcanoDiscovery Indonesia)
The effusive phase of intense activity continues. ... Read all
Thu, 23 Feb 2023, 19:23

Karangetang volcano (Api Siau Island, northern Indonesia): two active craters, amount of glowing rockfalls from Crater 1 increases and Crater 2 illuminates, field report

Dramatic view of currently two active craters, of which Crater 1 is erupting (foreground) and Crater 2 is "only" glowing (image:  Andi Volcanist/VolcanoDiscovery Indonesia)
The effusive eruption at the volcano is slowly but surely intensifying, Andi Volcanist, our expedition leader and guide, reported from field observations. ... Read all
Show more
Karangetang volcano
Stratovolcano 1784 m (5,853 ft)
Siau Island, Sangihe Islands, Indonesia, 2.78°N / 125.4°E
Current status: minor activity or eruption warning (3 out of 5) Karangetang volcano eruptions:
1675, 1712, 1825, 1864, 1883, 1886, 1887, 1892, 1899, 1900, 1905, 1921, 1922, 1924, 1926, 1930, 1930, 1935, 1940, 1940, 1941, 1947, 1947, 1948, 1949, 1952, 1953, 1961, 1961, 1962-62, 1965-67, 1967, 1970-71, 1972-76, 1976-77, 1978, 1979, 1980, 1982, 1983-88, 1989, 1991-93, 1995, 1996-97, 1998, 1999-2003, 2004-2005. 2008-9, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2018-ongoing
Typical eruption style
Explosive. Formation of lava domes and pyroclastic flows.

Karangetang volcano tours

Siau Island + Krakatau (Indonesia)
Karangetang + Krakatau Volcano Special
12-day expedition to see the ongoing eruption of Karangetang and Krakatau volcanoes
13 days / 12 nights - Easy
Price 2850 €
no scheduled dates at present
Sulawesi/Halmahera (Indonesia)
Volcanoes and Spices
17-day volcano trekking tour to the Molucca Sea: N-Sulawesi, Karangetang and Halmahera
17 days / 16 nights - Moderate
Price 3570 €
2-18 Jul 2023
1-17 Aug 2023
4-20 Sep 2023
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