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 15 kts in W direction.
The full report is as follows:
FVAU02 at 03:14 UTC, 09/12/25 from ADRM
VA ADVISORY
DTG: 20251209/0320Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2025/1403
INFO SOURCE: CVGHM, HIMAWARI-9, WEBCAM
ERUPTION DETAILS: VA TO FL150 LAST REPORTED AT 09/0118Z
EST VA DTG: 09/0300Z
EST VA CLD: SFC/FL150 S0809 E11259 – S0810 E11228 – S0756
E11218 – S0746 E11238 – S0804 E11300 MOV W 15KT
FCST VA CLD +6 HR: 09/0900Z SFC/FL150 S0804 E11301 – S0809
E11301 – S0810 E11224 – S0757 E11215 – S0746 E11236
FCST VA CLD +12 HR: 09/1500Z SFC/FL150 S0809 E11300 – S0810
E11225 – S0754 E11219 – S0746 E11236 – S0804 E11301
FCST VA CLD +18 HR: 09/2100Z SFC/FL150 S0810 E11301 – S0809
E11223 – S0808 E11223 – S0755 E11215 – S0745 E11236 – S0803
E11302
RMK: VA NOT IDENTIFIABLE ON LATEST SATELLITE IMAGERY DUE TO
MET CLOUD COVER. CVGHM GROUND REPORTS INDICATE INTERMITTENT
DISCRETE EMISSIONS REMAIN ONGOING. HEIGHT AND MOVEMENT BASED
ON RECENT GROUND REPORTS AND MODEL GUIDANCE
NXT ADVISORY: NO LATER THAN 20251209/0920Z=