From 15/09/2026 to 16/09/2026, a Tropical Depression (maximum wind speed of 120 km/h) TWENTYFOUR-26 was active in NWPacific. The cyclone affects these countries: Japan (vulnerability Low). Estimated population affected by category 1 (120 km/h) wind speeds or higher is 97355 .
Etna Volcano Volcanic Ash Advisory: ERUPTION AT 20260914/0240Z WEAK ERUPTION ONGOING OBS VA DTG: 15/1000Z
The Volcanic Ash Advisory Center (VAAC) Toulouse issued the following bulletin.
Original VAAC bulletin:
FVXX01 at 10:00 UTC, 15/09/26 from LFPW
VA ADVISORY
DTG: 20260915/1000Z
VAAC: TOULOUSE
VOLCANO: ETNA 211060
PSN: N3744 E01459
AREA: SICILY VOLCANIC PROVINCE
SOURCE ELEV: 3357M
ADVISORY NR: 2026/157
INFO SOURCE: INGV VONA, SAT IMAGERY, WEBCAMS
AVIATION COLOUR CODE: RED
ERUPTION DETAILS: ERUPTION AT 20260914/0240Z WEAK ERUPTION ONGOING
OBS VA DTG: 15/1000Z
OBS VA CLD: VA NOT IDENTIFIABLE FM SATELLITE DATA WIND FL100
350/05KT
FCST VA CLD +6 HR: 15/1600Z SFC/FL130 N3745 E01503 - N3723 E01509 -
N3723 E01500 - N3745 E01457 - N3745 E01503
FCST VA CLD +12 HR: 15/2200Z SFC/FL130 N3745 E01457 - N3745 E01506 -
N3721 E01457 - N3727 E01445 - N3745 E01457
FCST VA CLD +18 HR: 16/0400Z SFC/FL130 N3748 E01457 - N3745 E01506 -
N3715 E01500 - N3723 E01445 - N3748 E01457
RMK: PROBABLE THIN ASH PLUME DRIFTING SOUTHWARD AND QUICKLY
DISSIPATING. DUE TO THE LOW INTENSITY OF THE EVENT, QVA ARE NOT
PROVIDED.
NXT ADVISORY: NO LATER THAN 20260915/1600Z=
Lewotolo Volcanic Ash Advisory: ground report of ash eruption as of 15 Sep 2026, 05:40 UTC
Satellite image of Lewotolo volcano on 15 Sep 2026
A ground report indicated an ash eruption at Lewotolo at 05:39 UTC on 14 Sep 2026, with ash estimated at 200 m above the summit and moving northwest at 10 knots. Ash was not detected on satellite imagery due to meteorological cloud; intermittent ash eruptions are expected.
Original VAAC bulletin:
FVAU04 at 06:03 UTC, 15/09/26 from ADRM
VA ADVISORY
DTG: 20260915/0600Z
VAAC: DARWIN
VOLCANO: LEWOTOLOK 264230
PSN: S0816 E12330
AREA: INDONESIA
SOURCE ELEV: 1423M AMSL
ADVISORY NR: 2026/236
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: GROUND REPORT OF VA ERUPTION AT 14/0539Z
EST VA DTG: 15/0540Z
EST VA CLD: SFC/FL060 S0825 E12331 - S0804 E12242 - S0728
E12314 - S0818 E12339 MOV NW 10KT
FCST VA CLD +6 HR: 15/1140Z SFC/FL060 S0825 E12333 - S0812
E12236 - S0730 E12258 - S0815 E12341
FCST VA CLD +12 HR: 15/1740Z SFC/FL060 S0815 E12339 - S0826
E12335 - S0823 E12236 - S0741 E12250
FCST VA CLD +18 HR: 15/2340Z SFC/FL060 S0823 E12332 - S0827
E12239 - S0753 E12242 - S0735 E12303 - S0813 E12338
RMK: GROUND REPORT OF ERUPTION WITH VA TO 200M ABOVE SUMMIT
MOVING W. VA NOT DETECTED ON CURRENT SATELLITE IMAGERY DUE
TO MET CLOUD. ONGOING INTERMITTENT VA ERUPTIONS EXPECTED.
FORECAST USING MODEL CONSENSUS DATA.
NXT ADVISORY: NO LATER THAN 20260915/1200Z=
Semeru Volcanic Ash Advisory: ash plume to 15,000 ft (4,600 m) as of Sep 15, 00:10 UTC
Satellite image of Semeru volcano on 15 Sep 2026
Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 15000 ft (4600 m), or flight level 150.
Original VAAC bulletin:
FVAU02 at 00:30 UTC, 15/09/26 from ADRM
VA ADVISORY
DTG: 20260915/0030Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/1055
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL150 OBS AT 14/0010Z MOV SE
OBS VA DTG: 15/0010Z
OBS VA CLD: SFC/FL150 S0802 E11255 - S0820 E11327 - S0829
E11325 - S0833 E11317 - S0807 E11251 MOV SE 20KT
FCST VA CLD +6 HR: 15/0610Z SFC/FL150 S0807 E11251 - S0802
E11254 - S0813 E11324 - S0826 E11326 - S0831 E11314
FCST VA CLD +12 HR: 15/1210Z SFC/FL150 S0807 E11251 - S0801
E11254 - S0808 E11323 - S0820 E11325 - S0826 E11314
FCST VA CLD +18 HR: 15/1810Z SFC/FL150 S0803 E11254 - S0814
E11327 - S0824 E11327 - S0830 E11319 - S0807 E11251
RMK: VA IDENTIFIABLE ON RGB AND VIS SATELLITE IMAGERY.
RECENT GROUND REPORTS INDICATE ONGOING DISCRETE EMISSIONS.
HEIGHT AND MOVEMENT BASED ON SATELLITE IMAGERY, GROUND
REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20260915/0630Z=
Etna Volcanic Ash Advisory: eruption ongoing as of 22:00 UTC
An eruption of Etna with low intensity is ongoing as of 22:00 UTC on 14 September 2026. No ash plume height was observed or reported in the latest bulletin.
Original VAAC bulletin:
FVXX01 at 22:00 UTC, 14/09/26 from LFPW
VA ADVISORY
DTG: 20260914/2200Z
VAAC: TOULOUSE
VOLCANO: ETNA 211060
PSN: N3744 E01459
AREA: SICILY VOLCANIC PROVINCE
SOURCE ELEV: 3357M
ADVISORY NR: 2026/155
INFO SOURCE: VONA, SAT IMG, WEBCAMS
AVIATION COLOUR CODE: RED
ERUPTION DETAILS: ERUPTION AT 20260914/0240Z ERRUPTION ONGOING WITH
LOW INTENSITY.
OBS VA DTG: 14/2200Z
OBS VA CLD: VA NOT IDENTIFIABLE FM SATELLITE DATA WIND FL120
360/10KT
FCST VA CLD +6 HR: 15/0400Z SFC/FL130 N3748 E01454 - N3751 E01503 -
N3721 E01509 - N3718 E01445 - N3748 E01454
FCST VA CLD +12 HR: 15/1000Z SFC/FL130 N3748 E01454 - N3748 E01506 -
N3718 E01506 - N3718 E01448 - N3748 E01454
FCST VA CLD +18 HR: 15/1600Z SFC/FL130 N3748 E01454 - N3748 E01506 -
N3718 E01506 - N3718 E01445 - N3748 E01454
RMK: ERRUPTION ONGOING WITH ASH PLUME DRIFTING SOUTHWARD AND QUICKLY
DISSIPATING. DUE TO THE LOW INTENSITY OF THE EVENT QVA ARE NOT
PROVIDED.
NXT ADVISORY: NO LATER THAN 20260915/0400Z=