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 05 kts in SE direction.
The full report is as follows:
FVAU02 at 23:14 UTC, 18/12/25 from ADRM
VA ADVISORY
DTG: 20251218/2310Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2025/1445
INFO SOURCE: CVGHM, HIMAWARI-9, WEBCAM
ERUPTION DETAILS: VA TO FL150 LAST REPORTED AT 18/2224Z
EST VA DTG: 18/2250Z
EST VA CLD: SFC/FL150 S0802 E11245 – S0755 E11257 – S0817
E11334 – S0844 E11257 MOV SE 05KT
FCST VA CLD +6 HR: 19/0450Z SFC/FL150 S0804 E11246 – S0757
E11255 – S0819 E11331 – S0842 E11301
FCST VA CLD +12 HR: 19/1050Z SFC/FL150 S0804 E11248 – S0759
E11253 – S0815 E11334 – S0839 E11307
FCST VA CLD +18 HR: 19/1650Z SFC/FL150 S0804 E11247 – S0758
E11252 – S0813 E11336 – S0840 E11313
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 HIMAWARI-9 SATELLITE IMAGERY, GROUND REPORTS AND MODEL
GUIDANCE.
NXT ADVISORY: NO LATER THAN 20251219/0510Z=