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Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 7000 ft (2100 m) altitude or flight level 070 and is moving at 05 kts in E direction.
The full report is as follows:

FVAU01 at 16:24 UTC, 17/12/25 from ADRM
VA ADVISORY
DTG: 20251217/1624Z
VAAC: DARWIN
VOLCANO: IBU 268030
PSN: N0129 E12738
AREA: INDONESIA
SOURCE ELEV: 1325M AMSL
ADVISORY NR: 2025/1409
INFO SOURCE: CVGHM, HIMAWARI-9
ERUPTION DETAILS: VA TO FL070 LAST REPORTED AT 17/1236Z
EST VA DTG: 17/1610Z
EST VA CLD: SFC/FL070 N0131 E12735 – N0143 E12747 – N0131
E12758 – N0121 E12750 – N0125 E12736 MOV E 05KT
FCST VA CLD +6 HR: 17/2210Z SFC/FL070 N0130 E12735 – N0143
E12747 – N0138 E12756 – N0128 E12754 – N0125 E12737
FCST VA CLD +12 HR: 18/0410Z SFC/FL070 N0131 E12735 – N0142
E12749 – N0137 E12756 – N0127 E12755 – N0126 E12736
FCST VA CLD +18 HR: 18/1010Z SFC/FL070 N0128 E12735 – N0132
E12736 – N0139 E12751 – N0130 E12758 – N0120 E12749
RMK: VA NOT IDENTIFIABLE ON LATEST SATELLITE IMAGERY DUE TO
MET CLOUD. GROUND REPORTS INDICATE INTERMITTENT DISCRETE
EMISSIONS ARE ONGOING. VA HEIGHT AND MOVEMENT BASED ON MODEL
GUIDANCE AND GROUND REPORTS.
NXT ADVISORY: NO LATER THAN 20251217/2224Z=

The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that the eruption continued at Dukono on 16 December 2025 (local). Ash and gas plume(s) rose to a maximum of 1,300 m (4,265 ft) above the vent. There was 1 seismically detected explosion reported. The alert level remained at „Level 2 – Alert“ (on a 4-level scale).
Source: Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG)

Current Alerts:
Observatory alert level: „Level 2 – Alert“ (on a 4-level scale)
Aviation Alert Level: unavailable or not collected

Adapted from: Smithsonian / USGS Daily Volcanic Activity Report for Dec 16, 2025