An ash eruption was observed at Semeru at 27 August 2026, 09:40 UTC. Ash height and movement are estimated from earlier satellite imagery, ground reports, and model guidance; volcanic ash was not identifiable on current satellite imagery.
Original VAAC bulletin:
FVAU02 at 15:58 UTC, 27/08/26 from ADRM
VA ADVISORY
DTG: 20260827/1600Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/979
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA ERUPTION OBS AT 27/0940Z
EST VA DTG: 27/1540Z
EST VA CLD: SFC/FL150 S0800 E11249 - S0745 E11306 - S0750
E11323 - S0828 E11319 - S0838 E11250 - S0809 E11246 MOV E
05KT
FCST VA CLD +6 HR: 27/2140Z SFC/FL150 S0801 E11249 - S0750
E11316 - S0759 E11320 - S0840 E11314 - S0837 E11247 - S0809
E11246
FCST VA CLD +12 HR: 28/0340Z SFC/FL150 S0806 E11249 - S0800
E11253 - S0801 E11319 - S0820 E11323 - S0844 E11313 - S0838
E11251
FCST VA CLD +18 HR: 28/0940Z SFC/FL150 S0808 E11248 - S0757
E11254 - S0753 E11319 - S0810 E11326 - S0832 E11313 - S0837
E11249
RMK: VA NOT IDENTIFIABLE ON CURRENT SATELLITE IMAGERY.
GROUND REPORTS INDICATE ONGOING ERUPTIONS. VA HEIGHT AND
MOVEMENT BASED ON PAST SATELLITE IMAGERY, GROUND REPORTS AND
MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260827/2200Z=