Overview
- The Darwin VAAC confirmed ash reaching about 16.5 km (54,000 ft) above sea level at 09:20 UTC based on Himawari‑8 satellite data.
- Large pyroclastic density currents followed the Besuk Kobokan drainage, starting around 14:30 WIB with early runouts near 5 km and later reports suggesting pulses up to 15 km.
- Satellite infrared analysis indicated continuous summit emissions with ash dispersing toward the north and northwest despite meteorological cloud.
- Authorities maintained an 8 km exclusion along Besuk Kobokan, a 2.5 km summit-radius restriction, and additional warnings for adjacent valleys and riverbanks due to PDCs and lahar risk.
- Local reports described evacuations as activity continued through the afternoon, with ground footage showing ash‑rich flows moving down established channels.