Six Volcanoes Currently on Alert Status, Including Anak Krakatau
Mount Anak Krakatau has erupted whilst on Level III, or alert, status. Besides Anak Krakatau, five other volcanoes are currently on alert status.
As is known, Mount Anak Krakatau erupted again on Sunday evening (6/9), with the eruption recorded at 20:23 Western Indonesia Time.
The Head of the Geological Agency at the Ministry of Energy and Mineral Resources, Lana Saria, said volcanic ash from the eruption of Mount Anak Krakatau had spread to five provinces: Banten, parts of West Java, DKI Jakarta, Lampung and Bengkulu.
“Based on combined eruption information and VONA (Volcano Observatory Notice for Aviation) from PVMBG via Magma Indonesia, information from the Darwin VAAC (Volcanic Ash Advisory Centre) and analysis of Himawari-9 satellite imagery by the BMKG, volcanic ash from Mount Anak Krakatau has been observed spreading through the atmosphere towards Banten, parts of West Java, DKI Jakarta, as well as Lampung and Bengkulu,” said Lana at an online press conference on Sunday (6/9/2026).
Besides Mount Anak Krakatau, five other volcanoes in Indonesia are currently on Alert status. Here is the list:
- Anak Krakatau, Sunda Strait/South Lampung
Mount Anak Krakatau has been at Level III (Alert) since 2 July 2026. It subsequently experienced major eruptions, with volcanic ash spreading widely.
On Sunday (6/9/2026) evening, Mount Anak Krakatau was still erupting. By Monday morning, volcanic activity at the volcano remained observed, with four blowing earthquakes recorded.
- Sinabung, North Sumatra
PVMBG raised Sinabung from Level II (Advisory) to Level III (Alert) on 31 August 2026.
Based on observations of Mount Sinabung on Friday (4/9) between 12:00 and 18:00 WIB, thick white smoke was visually observed rising from the main crater to a height of around 300 to 500 metres above the summit.
- Semeru, East Java
Semeru has remained at Level III (Alert) since January 2026 and was still erupting on Monday morning.
PVMBG officer Rian Sigit Alfian reported that the height of the eruption column was not observed, though eruptive activity was recorded on the seismograph. “An eruption of Mount Semeru occurred on Monday, 7 September 2026, at 04:50 WIB,” he said on Monday (7/9).
- Lewotobi Laki-laki, East Nusa Tenggara
PVMBG raised its status from Level II to Level III on 12 May 2026. As of 4 August, the volcano had recorded two eruptions.
The ash column reached a height of 800 metres, observed as grey in colour with thick intensity, drifting west and north-west.
- Ili Lewotolok, East Nusa Tenggara
The status of Ili Lewotolok was raised from Level II to Level III on 2 July 2025. Most recently, the volcano was still erupting on Sunday night.
“An eruption of Mount Ili Lewotolok occurred on Sunday, 6 September 2026, at 21:37 Central Indonesia Time, with an ash column observed at approximately 500 metres above the summit. The eruption was recorded on the seismograph with a maximum amplitude of 40 mm and a duration of 32 seconds,” the Geological Agency wrote in a statement quoted by detikcom from its official X account on Sunday (6/9).
- Ibu, North Maluku
PVMBG previously lowered Ibu from Level IV (Warning) to Level III (Alert) on 28 January 2025.
Mount Ibu, located on Halmahera Island in North Maluku, last erupted on Sunday (6/9) evening, with the eruption reaching 500 metres above the summit.