A volcanic ash cloud from Ibu was observed moving southeast as of 20 September 2026, 21:50 UTC. Forecasts indicate continued ash presence at similar altitudes over the next 18 hours.
Original VAAC bulletin:
FVAU03 at 22:10 UTC, 20/09/26 from ADRM
VA ADVISORY
DTG: 20260920/2210Z
VAAC: DARWIN
VOLCANO: IBU 268030
PSN: N0129 E12738
AREA: INDONESIA
SOURCE ELEV: 1325M AMSL
ADVISORY NR: 2026/1070
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA OBS TO FL070 MOV SE AT 20/2150Z
EST VA DTG: 20/2150Z
EST VA CLD: SFC/FL070 N0129 E12734 - N0135 E12736 - N0138
E12803 - N0116 E12805 - N0107 E12749 MOV SE 05KT
FCST VA CLD +6 HR: 21/0350Z SFC/FL070 N0125 E12738 - N0131
E12732 - N0154 E12738 - N0149 E12801 - N0128 E12802
FCST VA CLD +12 HR: 21/0950Z SFC/FL070 N0127 E12734 - N0133
E12734 - N0146 E12757 - N0132 E12806 - N0119 E12758
FCST VA CLD +18 HR: 21/1550Z SFC/FL070 N0128 E12733 - N0135
E12735 - N0140 E12803 - N0125 E12808 - N0114 E12758
RMK: DISCRETE VA EMISSION IDENTIFIABLE ON SATELLITE IMAGERY.
REGULAR GROUND REPORTS INDICATE INTERMITTENT DISCRETE
ERUPTIONS ARE ONGOING. HEIGHT AND MOVEMENT BASED ON
SATELLITE IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260921/0410Z=