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An eruption was reported at Sakurajima at 18:02 UTC on 21 September 2026, but no volcanic ash cloud was identifiable in satellite data as of 18:00 UTC. No further advisories are planned unless ash is detected.
Original VAAC bulletin:

FVFE01 at 18:16 UTC, 21/09/26 from RJTD
VA ADVISORY
DTG: 20260921/1816Z
VAAC: TOKYO
VOLCANO: SAKURAJIMA [AIRA CALDERA] 282080
PSN: N3136 E13039
AREA: JAPAN
SOURCE ELEV: 1117M AMSL
ADVISORY NR: 2026/218
INFO SOURCE: JMA HIMAWARI-9
ERUPTION DETAILS: ERUPTED AT 20260921/1802Z FL090 STNR
OBS VA DTG: 21/1800Z
OBS VA CLD: VA NOT IDENTIFIABLE FM SATELLITE DATA WIND FL090 330/4KT
FCST VA CLD +6 HR: NOT AVBL
FCST VA CLD +12 HR: NOT AVBL
FCST VA CLD +18 HR: NOT AVBL
RMK: WE WILL ISSUE FURTHER ADVISORY IF VA IS DETECTED IN SATELLITE 
IMAGERY.
NXT ADVISORY: NO FURTHER ADVISORIES=

Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Tokyo warned of a volcanic ash plume rising to an estimated 9000 ft (2700 m), or flight level 090, and moving at 10 kts in NE direction.
Original VAAC bulletin:

FVFE01 at 14:22 UTC, 21/09/26 from RJTD
VA ADVISORY
DTG: 20260921/1422Z
VAAC: TOKYO
VOLCANO: CHIKURACHKI 290360
PSN: N5019 E15528
AREA: KURIL ISLANDS
SOURCE ELEV: 1781M AMSL
ADVISORY NR: 2026/5
INFO SOURCE: HIMAWARI-9
ERUPTION DETAILS: VA AT 20260921/1400Z FL090 EXTD NE
OBS VA DTG: 21/1400Z
OBS VA CLD: SFC/FL090 N5021 E15524 - N5038 E15540 - N5031 E15548 - 
N5017 E15530 MOV NE 10KT
FCST VA CLD +6 HR: 21/2000Z SFC/FL090 N5111 E15759 - N5041 E15752 - 
N5014 E15525 - N5105 E15441 - N5128 E15440
FCST VA CLD +12 HR: 22/0200Z SFC/FL110 N5118 E16015 - N5043 E15927 - 

N5015 E15526 - N5336 E15420
FCST VA CLD +18 HR: 22/0800Z SFC/FL130 N5240 E16201 - N5058 E16211 - 

N5007 E15517 - N5451 E15441 - N5520 E15525
RMK: NIL
NXT ADVISORY: 20260921/1800Z=