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 S direction.
The full report is as follows:
FVAU02 at 13:40 UTC, 21/05/26 from ADRM
VA ADVISORY
DTG: 20260521/1350Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/576
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL150 LAST REP AT 21/1053Z
EST VA DTG: 21/1330Z
EST VA CLD: SFC/FL150 S0759 E11258 – S0837 E11326 – S0846
E11241 – S0801 E11249 MOV S 05KT
FCST VA CLD +6 HR: 21/1930Z SFC/FL150 S0802 E11249 – S0759
E11257 – S0805 E11317 – S0836 E11330 – S0841 E11246
FCST VA CLD +12 HR: 22/0130Z SFC/FL150 S0820 E11246 – S0804
E11237 – S0751 E11239 – S0748 E11252 – S0748 E11308 – S0800
E11317 – S0818 E11315
FCST VA CLD +18 HR: 22/0730Z SFC/FL150 S0814 E11247 – S0755
E11230 – S0738 E11241 – S0741 E11314 – S0759 E11314 – S0813
E11304
RMK: VA NOT IDENTIFIABLE ON SATELLITE IMAGERY DUE TO MET
CLOUD OBSCURATION. HOWEVER, INTERMITTENT DISCRETE ERUPTION
EXPECTED TO BE ONGOING. HEIGHT AND MOVEMENT BASED ON
SATELLITE IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260521/1950Z=