The Weekly Volcanic Activity Report: September 10-16, 2026
New activity/unrest was reported for 1 volcano from September 10 to 16, 2026. During the same period, ongoing activity was reported for 18 volcanoes.
The Weekly Volcanic Activity Report: September 3-9, 2026
New activity/unrest was reported for 4 volcanoes from September 3 to 9, 2026. During the same period, ongoing activity was reported for 20 volcanoes.
Strong eruption at Anak Krakatau closes 8 airports, disrupts 1 558 flights in Indonesia
Volcanic ash from Anak Krakatau prompted temporary closures at eight airports across western Indonesia on September 6, 2026. As of 17:06 WIB (10:06 UTC), the Ministry of Transportation reported 1 558 delayed flights and approximately 170 000 affected passengers, while the closures were extended through 24:00 WIB (17:00 UTC). The volcano remained at Level III (Siaga), with a 3 km (2 miles) exclusion zone around its center of activity.
High-level eruption at Anak Krakatau ejects ash over 15 km (50 000 feet) a.s.l., Indonesia
A high-level eruption at Anak Krakatau, Indonesia, ejected volcanic ash up to 15 km (50 000 feet) above sea level at 00:50 WIB on September 5, 2026 (17:50 UTC on September 4). Darwin Volcanic Ash Advisory Center (VAAC) later tracked the ash moving west at approximately 74 km/h (46 mph), while a second layer to about 5.5 km (18 000 feet) extended south. SIGMETs were issued for the Jakarta and Melbourne flight information regions.
The Weekly Volcanic Activity Report: August 27 – September 2, 2026
New activity/unrest was reported for 5 volcanoes from August 27 – September 2, 2026. During the same period, ongoing activity was reported for 17 volcanoes.
Sinabung eruption prompts Level III alert, evacuations and flight disruptions, Indonesia
Indonesia’s Geological Agency raised Mount Sinabung in North Sumatra to Level III (Siaga) after an eruption on August 31, 2026, sent ash about 3 500 m (11 500 feet) above the summit. By September 1, preliminary disaster-agency data placed 615 residents of Kuta Tengah in an evacuation shelter, while airport data showed 21 flights to and from Kualanamu International Airport had been canceled.
The Weekly Volcanic Activity Report: August 13-19, 2026
New activity/unrest was reported for 6 volcanoes from August 13-19, 2026. During the same period, ongoing activity was reported for 15 volcanoes.
Discharge rises, significant gas pollution reported during Múlakvísl glacial outburst flood, Iceland
Electrical conductivity in Múlakvísl rose to just over 500 µS/cm during an ongoing glacial outburst flood on August 20, 2026, while discharge increased and significant gas pollution continued, according to the Icelandic Meteorological Office (IMO). The river level had not risen significantly, but webcam observations showed the river spreading across a wider area.
The Weekly Volcanic Activity Report: August 6-12, 2026
New activity/unrest was reported for 6 volcanoes from August 6-12, 2026. During the same period, ongoing activity was reported for 20 volcanoes.
Intense Mount Etna eruption sends ash south, Catania Airport suspends arrivals, Italy
Mount Etna continued intense explosive and effusive activity on August 10, 2026, with abundant ash from Voragine and multiple active lava flows. Catania Airport suspended arrivals until 17:00 LT (15:00 UTC) as volcanic ash affected operations, while Toulouse VAAC maintained Etna’s Aviation Color Code at Red.
