Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 and is moving at 10 kts in NE direction.
The full report is as follows:
FVAU02 at 17:00 UTC, 21/12/25 from ADRM
VA ADVISORY
DTG: 20251221/1710Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2025/1456
INFO SOURCE: CVGHM, HIMAWARI-9
ERUPTION DETAILS: VA TO FL150 LAST REPORTED 21/1440Z
EST VA DTG: 21/1650Z
EST VA CLD: SFC/FL150 S0810 E11254 – S0806 E11250 – S0746
E11300 – S0800 E11315 MOV NE 10KT
FCST VA CLD +6 HR: 21/2250Z SFC/FL150 S0810 E11254 – S0806
E11250 – S0746 E11257 – S0758 E11313
FCST VA CLD +12 HR: 22/0450Z SFC/FL150 S0810 E11254 – S0806
E11250 – S0746 E11257 – S0758 E11312
FCST VA CLD +18 HR: 22/1050Z SFC/FL150 S0810 E11254 – S0806
E11250 – S0746 E11257 – S0758 E11312
RMK: VA NOT IDENTIFIABLE ON LATEST SATELLITE IMAGERY DUE TO
MET CLOUD. RECENT GROUND REPORTS INDICATE INTERMITTENT
DISCRETE EMISSIONS ARE ONGOING. VA HEIGHT AND MOVEMENT BASED
ON GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20251221/2310Z=