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Satellite image of Lewotobi volcano on 12 Apr 2026

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 7000 ft (2100 m) altitude or flight level 070 .
The full report is as follows:

FVAU04 at 14:21 UTC, 12/04/26 from ADRM
VA ADVISORY
DTG: 20260412/1420Z
VAAC: DARWIN
VOLCANO: LEWOTOBI 264180
PSN: S0833 E12246
AREA: INDONESIA
SOURCE ELEV: 1703M AMSL
ADVISORY NR: 2026/35
INFO SOURCE: CVGHM, HIMAWARI-9
ERUPTION DETAILS: VA OBS TO FL070 AT 12/1350Z MOV NW
OBS VA DTG: 12/1350Z
OBS VA CLD: SFC/FL070 S0834 E12249 – S0837 E12241 – S0831
E12231 – S0822 E12239 – S0832 E12251 MOV NW 15KT
FCST VA CLD +6 HR: 12/1950Z SFC/FL070 S0834 E12249 – S0836
E12242 – S0832 E12232 – S0823 E12237 – S0826 E12245 – S0832
E12251
FCST VA CLD +12 HR: 13/0150Z SFC/FL070 S0834 E12250 – S0836
E12242 – S0833 E12231 – S0824 E12235 – S0827 E12247 – S0831
E12251
FCST VA CLD +18 HR: 13/0750Z NO VA EXP
RMK: VONA RECEIVED INDICATING ERUPTION TO 500M ABOVE SUMMIT.
WEAK DISCRETE VA OBS ON RGB SAT IMG EXTENDING NW OF SUMMIT.
VA HEIGHT AND FORECAST BASED ON SAT IMG, GROUND REPORT AND
MODEL GUIDANCE.VA EXPECTED TO DISSIPATE WITHIN 6-12HOURS.
NXT ADVISORY: NO LATER THAN 20260412/2020Z=

Satellite image of Dukono volcano on 12 Apr 2026

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 9000 ft (2700 m) altitude or flight level 090 .
The full report is as follows:

FVAU03 at 10:26 UTC, 12/04/26 from ADRM
VA ADVISORY
DTG: 20260412/1030Z
VAAC: DARWIN
VOLCANO: DUKONO 268010
PSN: N0142 E12754
AREA: INDONESIA
SOURCE ELEV: 1229M AMSL
ADVISORY NR: 2026/107
INFO SOURCE: HIMAWARI-9
ERUPTION DETAILS: VA FL090 OBS AT 12/1010Z, MOV E
OBS VA DTG: 12/1010Z
OBS VA CLD: SFC/FL090 N0141 E12745 – N0153 E12746 – N0153
E12940 – N0051 E12932 MOV E 10KT
FCST VA CLD +6 HR: 12/1610Z SFC/FL090 N0141 E12746 – N0154
E12751 – N0148 E12938 – N0049 E12927
FCST VA CLD +12 HR: 12/2210Z SFC/FL090 N0140 E12745 – N0152
E12749 – N0145 E12938 – N0053 E12927
FCST VA CLD +18 HR: 13/0410Z SFC/FL090 N0140 E12744 – N0152
E12747 – N0149 E12941 – N0050 E12927
RMK: VA IDENTIFIABLE ON LATEST RGB SATELLITE IMAGERY EXT E
OF SUMMIT. VA HEIGHT AND MOVEMENT BASED ON SATELLITE
IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260412/1630Z=

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 12000 ft (3700 m) altitude or flight level 120 .
The full report is as follows:

FVAU04 at 01:43 UTC, 12/04/26 from ADRM
VA ADVISORY
DTG: 20260412/0143Z
VAAC: DARWIN
VOLCANO: MARAPI 261140
PSN: S0023 E10028
AREA: INDONESIA
SOURCE ELEV: 2885M AMSL
ADVISORY NR: 2026/56
INFO SOURCE: CVGHM, HIMAWARI-9
ERUPTION DETAILS: VA TO FL120 OBS AT 12/0130Z MOV SE
OBS VA DTG: 12/0130Z
OBS VA CLD: SFC/FL120 S0025 E10020 – S0013 E10027 – S0023
E10105 – S0043 E10108 – S0056 E10050 MOV SE 10KT
FCST VA CLD +6 HR: 12/0730Z SFC/FL120 S0026 E10020 – S0013
E10026 – S0022 E10105 – S0044 E10109 – S0057 E10051
FCST VA CLD +12 HR: 12/1330Z NO VA EXP
FCST VA CLD +18 HR: 12/1930Z NO VA EXP
RMK: DISCRETE INTERMITTENT VA EMISSIONS OBSERVED ON
SATELLITE IMAGERY. GROUND REPORTS INDICATE VA TO 500M ABOVE
SUMMIT. VA EXPECTED TO DISSIPATE WITHIN 6-12 HOURS. VA
HEIGHT BASED ON GROUND REPORT, MOVEMENT BASED ON SATELLITE
IMAGERY AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260412/0743Z=

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 .
The full report is as follows:

FVAU02 at 00:17 UTC, 12/04/26 from ADRM
VA ADVISORY
DTG: 20260412/0020Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/416
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL150 OBS AT 12/0000Z MOV NW
OBS VA DTG: 12/0000Z
OBS VA CLD: SFC/FL150 S0811 E11256 – S0800 E11229 – S0746
E11232 – S0743 E11247 – S0806 E11301 MOV NW 10KT
FCST VA CLD +6 HR: 12/0600Z SFC/FL150 S0810 E11254 – S0758
E11233 – S0744 E11242 – S0746 E11259 – S0807 E11300
FCST VA CLD +12 HR: 12/1200Z SFC/FL150 S0806 E11259 – S0811
E11255 – S0801 E11231 – S0748 E11235 – S0744 E11250
FCST VA CLD +18 HR: 12/1800Z SFC/FL150 S0806 E11300 – S0812
E11255 – S0800 E11231 – S0744 E11238 – S0742 E11255
RMK: DISCRETE, INTERMITTENT VA EMISSIONS IDENTIFIABLE ON
RECENT SATELLITE IMAGERY. GROUND REPORTS CONFIRM CONTINUING
ERUPTIONS. VA HEIGHT BASED ON GROUND REPORTS AND RECENT
ERUPTIVE BEHAVIOUR, MOVEMENT BASED ON SATELLITE IMAGERY AND
MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260412/0620Z=