Ash emissions from Lewotobi volcano reach 6 700 m (22 000 feet) a.s.l., Indonesia

Volcanic ash from Lewotobi volcano in Indonesia was observed at 6 700 m (22 000 feet) above sea level at 17:40 UTC on October 14, 2025. The advisory was issued by Darwin VAAC at 18:00 UTC.

According to the VAAC advisory, ash was clearly discernible in Himawari-8 satellite imagery, attached to the summit and extending northwest. The height of the ash cloud has been reassessed, reaching flight level 220, or approximately 6 700 m (22 000 feet) above sea level. The current Aviation Color Code is Red. Model guidance and infrared temperature analysis indicate the ash cloud will likely detach from the summit within 8 to 12 hours, with dissipation expected as it moves further northwest.

According to the Smithsonian / USGS Weekly Volcanic Activity Report for the week ending September 30, 2025, Lewotobi Laki-laki produced daily white-and-gray or gray ash plumes, reaching up to 2 000 m (6 600 feet) above the summit and drifting in various directions. On September 26–27, Fransiskus Xaverius Seda Airport, located 60 km (37 miles) west, was closed due to volcanic ash. The Alert Level was lowered to 3 on September 29, and the public was advised to remain at least 6 km (3.7 miles) from the volcano’s center.

Lewotobi is a twin stratovolcano located on eastern Flores Island, Indonesia, with Lewotobi Laki-laki and Lewotobi Perempuan cones. Known hazards include ashfall, pyroclastic flows, and lava effusion. The surrounding region is rural, but small villages like Pululera and Boru are situated within 10 km (6.2 miles) of the volcano and may be impacted by future volcanic activity.