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Volcanic Ash Advisory Center Washington (VAAC) issued the following report:

FVXX24 at 09:44 UTC, 30/12/25 from KNES
VA ADVISORY
DTG: 20251230/0942Z

VAAC: WASHINGTON

VOLCANO: PURACE 351060
PSN: N0219 W07624

AREA: COLOMBIA

SOURCE ELEV: 15256 FT AMSL

ADVISORY NR: 2025/155

INFO SOURCE: GOES-19.

ERUPTION DETAILS: VA NOT OBS

OBS VA DTG: 30/0910Z

OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE
DATA.

FCST VA CLD +6HR: 30/1500Z NO VA EXP

FCST VA CLD +12HR: 30/2100Z NO VA EXP

FCST VA CLD +18HR: 31/0300Z NO VA EXP

RMK: NO RCNT VA EMS OBS IN STLT IMAGERY. NO RCNT
RPRTS OF VA RCVD. …COVERDALE

NXT ADVISORY: NO FURTHER ADVISORIES

Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report:

FVAK22 at 04:54 UTC, 30/12/25 from PAWU
VAAAK2
VA ADVISORY

DTG: 20251230/0453Z

VAAC: ANCHORAGE

VOLCANO: OKMOK 311290

PSN: N5326 W16808

AREA: ALEUTIAN ISLANDS

SOURCE ELEV: 3520 FT AMSL

ADVISORY NR: 2025/003

INFO SOURCE: GOES

ERUPTION DETAILS: NA

OBS VA DTG: 30/0453Z

OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE DATA

FCST VA CLD +6HR: NO VA EXP

FCST VA CLD +12HR: NO VA EXP

FCST VA CLD +18HR: NO VA EXP

RMK: NIL…BH

NXT ADVISORY: NO FURTHER ADVISORIES=

Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 17000 ft (5200 m) altitude or flight level 170 .
The full report is as follows:

FVXX20 at 03:03 UTC, 30/12/25 from KNES
VA ADVISORY
DTG: 20251230/0301Z

VAAC: WASHINGTON

VOLCANO: REVENTADOR 352010
PSN: S0005 W07739

AREA: ECUADOR

SOURCE ELEV: 11686 FT AMSL

ADVISORY NR: 2025/1341

INFO SOURCE: GOES-19. NWP MODELS.

ERUPTION DETAILS: VA MOVG W

OBS VA DTG: 30/0230Z

OBS VA CLD: SFC/FL170 S0001 W07749 – S0004 W07739
– S0005 W07739 – S0007 W07749 – S0001 W07749 MOV
W 15KT

FCST VA CLD +6HR: 30/0830Z SFC/FL170 N0001 W07758
– S0004 W07739 – S0005 W07739 – S0008 W07758 –
N0001 W07758

FCST VA CLD +12HR: 30/1430Z SFC/FL170 N0004
W07754 – S0004 W07739 – S0005 W07740 – S0003
W07756 – N0004 W07754

FCST VA CLD +18HR: 30/2030Z SFC/FL170 N0003
W07754 – S0004 W07739 – S0005 W07739 – S0004
W07756 – N0003 W07754

RMK: OCNL VA EMS OBS IN STLT IMAGERY MOVG W FM
SUMMIT. VA FCST THRU T+18 HRS BASED ON NWP MDL
GUIDANCE SUGGESTING W/WNW MVMT. …COVERDALE

NXT ADVISORY: WILL BE ISSUED BY 20251230/0900Z

Satellite image of Semeru volcano on 29 Dec 2025

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 and is moving at 10 kts in SE direction.
The full report is as follows:

FVAU02 at 22:08 UTC, 29/12/25 from ADRM
VA ADVISORY
DTG: 20251229/2210Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2025/1490
INFO SOURCE: CVGHM, HIMAWARI-9, WEBCAM
ERUPTION DETAILS: VA TO FL150 LAST REPORTED AT 29/1908Z
EST VA DTG: 29/2140Z
EST VA CLD: SFC/FL150 S0806 E11251 – S0801 E11254 – S0807
E11318 – S0818 E11318 – S0823 E11307 MOV SE 10KT
FCST VA CLD +6 HR: 30/0340Z SFC/FL150 S0806 E11252 – S0801
E11255 – S0807 E11318 – S0818 E11318 – S0824 E11306
FCST VA CLD +12 HR: 30/0940Z SFC/FL150 S0806 E11251 – S0801
E11255 – S0807 E11318 – S0818 E11319 – S0824 E11306
FCST VA CLD +18 HR: 30/1540Z SFC/FL150 S0808 E11253 – S0801
E11254 – S0800 E11319 – S0811 E11325 – S0822 E11314
RMK: VA NOT IDENTIFIABLE ON SATELLITE IMAGERY DUE TO MET
CLOUD. RECENT GROUND REPORTS INDICATE INTERMITTENT DISCRETE
EMISSIONS ARE ONGOING. VA HEIGHT AND MOVEMENT BASED ON
GROUND REPORTS AND MODEL GUIDANCE. PREVIOUS ADVISORY UPDATED
DUE TO ERROR IN DTG.
NXT ADVISORY: NO LATER THAN 20251230/0410Z=