Volcanic Ash Advisory
Ibu
Tue, 18 Aug 2026 02:30:00 GMT
Raw Output
FVAU03 at 02:30 UTC, 18/08/26 from ADRM
VA ADVISORY
DTG: 20260818/0230Z
VAAC: DARWIN
VOLCANO: IBU 268030
PSN: N0129 E12738
AREA: INDONESIA
SOURCE ELEV: 1325M AMSL
ADVISORY NR: 2026/933
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA LAST OBS AT 18/0140Z MOV E
EST VA DTG: 18/0210Z
EST VA CLD: SFC/FL070 N0125 E12734 - N0131 E12732 - N0156
E12747 - N0140 E12807 - N0123 E12803 MOV NE 10KT
FCST VA CLD +6 HR: 18/0810Z SFC/FL070 N0124 E12738 - N0129
E12733 - N0153 E12738 - N0154 E12757 - N0133 E12808
FCST VA CLD +12 HR: 18/1410Z SFC/FL070 N0126 E12734 - N0132
E12733 - N0147 E12757 - N0136 E12806 - N0123 E12801
FCST VA CLD +18 HR: 18/2010Z SFC/FL070 N0127 E12734 - N0132
E12733 - N0146 E12756 - N0131 E12805 - N0117 E12757
RMK: VA NOT IDENTIFIABLE ON CURRENT SATELLITE IMAGERY. AREA
OBSC BY MET CLD. GROUND REPORTS INDICATE ONGOING VA
EMISSIONS. VA HEIGHT AND MOVEMENT BASED ON SATELLITE
IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260818/0830Z=
Ibu
Indonesia
Level 4
The truncated summit of Gunung Ibu stratovolcano along the NW coast of Halmahera Island has large nested summit craters. The inner crater, 1 km wide and 400 m deep, has contained several small crater lakes. The 1.2-km-wide outer crater is breached on the N, creating a steep-walled valley. A large cone grew ENE of the summit, and a smaller one to the WSW has fed a lava flow down the W flank. A group of maars is located below the N and W flanks. The first observed and recorded eruption was a small explosion from the summit crater in 1911. Eruptive activity began again in December 1998, producing a lava dome that eventually covered much of the floor of the inner summit crater along with ongoing explosive ash emissions.
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