Volcanic Ash Advisory

Ibu

Fri, 20 Mar 2026 17:50:00 GMT

Raw Output

FVAU01 at 17:32 UTC, 20/03/26 from ADRM
VA ADVISORY
DTG: 20260320/1750Z
VAAC: DARWIN
VOLCANO: IBU 268030
PSN: N0129 E12738
AREA: INDONESIA
SOURCE ELEV: 1325M AMSL
ADVISORY NR: 2026/323
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: ERUPTION LAST REPORTED AT 20/0744Z
EST VA DTG: 20/1730Z
EST VA CLD: SFC/FL070 N0132 E12735 - N0133 E12741 - N0104
        E12757 - N0058 E12730 MOV S 15KT
FCST VA CLD +6 HR: 20/2330Z SFC/FL070 N0132 E12734 - N0133
        E12741 - N0104 E12757 - N0057 E12730
FCST VA CLD +12 HR: 21/0530Z SFC/FL070 N0132 E12734 - N0134
        E12741 - N0105 E12758 - N0058 E12730
FCST VA CLD +18 HR: 21/1130Z SFC/FL070 N0132 E12734 - N0134
        E12741 - N0104 E12758 - N0058 E12730
RMK: VA NOT IDENTIFIABLE ON LATEST SATELLITE IMAGERY DUE TO
        MET CLOUD. VA EMISSIONS EXPECTED TO BE ONGOING, MOVING SSE
        OF SUMMIT. VA HEIGHT AND MOVEMENT BASED ON SATELLITE
        IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260320/2350Z=

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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