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

FVXX24 at 10:48 UTC, 25/12/25 from KNES
VA ADVISORY
DTG: 20251225/1046Z

VAAC: WASHINGTON

VOLCANO: PURACE 351060
PSN: N0219 W07624

AREA: COLOMBIA

SOURCE ELEV: 15256 FT AMSL

ADVISORY NR: 2025/134

INFO SOURCE: GOES-19. NWP MODELS.

ERUPTION DETAILS: VA EMS PSBL

EST VA DTG: 25/1010Z

EST VA CLD: SFC/FL170 N0219 W07622 – N0210 W07613
– N0206 W07616 – N0218 W07625 – N0219 W07622 MOV
SE 15KT

FCST VA CLD +6HR: 25/1600Z SFC/FL170 N0220 W07623
– N0207 W07608 – N0202 W07612 – N0219 W07626 –
N0220 W07623

FCST VA CLD +12HR: 25/2200Z SFC/FL170 N0220
W07623 – N0207 W07608 – N0201 W07612 – N0219
W07626 – N0220 W07623

FCST VA CLD +18HR: 26/0400Z NO VA EXP

RMK: VA EMS NOT OBS IN STLT IMG. WX CLDS OSBC THE
SUMMIT AREA. VA EMS PSBLY CONTNG BASED ON PREV
ACTIVITY. NWP MDL GUIDANCE FCSTS GEN SE MOMVT
THRU T+12. …MONAGHAN

NXT ADVISORY: WILL BE ISSUED BY 20251225/1700Z

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

FVAU02 at 04:25 UTC, 25/12/25 from ADRM
VA ADVISORY
DTG: 20251225/0430Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2025/1470
INFO SOURCE: CVGHM, HIMAWARI-9, WEBCAM
ERUPTION DETAILS: ERUPTION LAST REPORTED 25/0249Z
EST VA DTG: 25/0410Z
EST VA CLD: SFC/FL150 S0805 E11250 – S0745 E11308 – S0749
E11319 – S0803 E11321 – S0811 E11254 MOV NE 10KT
FCST VA CLD +6 HR: 25/1010Z SFC/FL150 S0805 E11250 – S0745
E11308 – S0749 E11319 – S0802 E11321 – S0811 E11254
FCST VA CLD +12 HR: 25/1610Z SFC/FL150 S0805 E11250 – S0743
E11303 – S0749 E11319 – S0802 E11321 – S0811 E11254
FCST VA CLD +18 HR: 25/2210Z SFC/FL150 S0807 E11251 – S0743
E11257 – S0743 E11312 – S0757 E11317 – S0811 E11256
RMK: VA NOT IDENTIFIABLE ON SATELLITE IMAGERY DUE TO MET
CLOUD. INTERMITTENT DISCRETE EMISSIONS ARE ONGOING. VA
HEIGHT AND MOVEMENT BASED ON GROUND REPORTS AND MODEL
GUIDANCE.
NXT ADVISORY: NO LATER THAN 20251225/1030Z=

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

FVAU01 at 03:26 UTC, 25/12/25 from ADRM
VA ADVISORY
DTG: 20251225/0326Z
VAAC: DARWIN
VOLCANO: IBU 268030
PSN: N0129 E12738
AREA: INDONESIA
SOURCE ELEV: 1325M AMSL
ADVISORY NR: 2025/1440
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL070 REPORTED 25/0309Z
EST VA DTG: 25/0310Z
EST VA CLD: SFC/FL070 N0132 E12739 – N0117 E12745 – N0116
E12735 – N0121 E12725 – N0132 E12736 MOV S 10KT
FCST VA CLD +6 HR: 25/0910Z NO VA EXP
FCST VA CLD +12 HR: 25/1510Z NO VA EXP
FCST VA CLD +18 HR: 25/2110Z NO VA EXP
RMK: CVGHM REPORT VA TO 600M ABV SUMMIT. VA NOT IDENTIFIABLE
ON SATELLITE. MET CLD OBSC AREA. EXPECTED TO DISSIPATE IN
3-6HRS. HEIGHT AND MOV BASED ON GROUND REPORT AND MODEL
GUIDANCE.
NXT ADVISORY: NO LATER THAN 20251225/0926Z=

World map showing currently active volcanoes as of 23 Dec 2025

Explosive and effusive activity stood out today, with Guatemala’s volcanoes producing frequent bursts while steady lava and glow persisted in Alaska and Hawaii. Fuego and Santa Maria generated regular explosions and ash plumes, and Purace lofted ash to 1.6 km amid ongoing degassing. Compared with yesterday, Shishaldin is now classified as erupting, and new ash was noted at Purace, Reventador, Ibu, Semeru, and Dukono.

United States
Alaska’s Great Sitkin (Aviation ORANGE) sustained lava effusion at the summit. Hawaii’s Kilauea (Aviation ORANGE) showed glow and intermittent spatter from its northern and southern vents alongside tremor. Shishaldin is classed as erupting and holds Aviation YELLOW, with no new ash reported.

Indonesia
Ibu and Semeru produced numerous explosions (91 and 172, respectively) with ash rising up to 800 m; Dukono sent ash 400 m above the vent. Elevated but quieter conditions persisted at Lewotobi (Level 3) and at Merapi, Marapi, Lewotolok, and Raung (Level 2) without notable ash. Unrest continued at Karangetang (Level 2).

Philippines
Kanlaon produced plumes to 700 m (Level 2). Taal emitted low plumes to 20 m (Level 1). Unrest at Mayon (Level 1) included summit incandescence, eight seismically detected rockfalls, and plumes to 400 m.

Mexico
Popocatepetl remained at Yellow Alert – Phase 2.

South America
Colombia’s Purace produced ash to 1.6 km and persistent degassing from a crater-wall fissure, with thermal anomalies detected. Ecuador’s Reventador sent ash up to 1 km and showed multiple thermal hotspots, while Sangay stayed at Alert Level 2 – Yellow. Peru’s Sabancaya emitted low gas plumes and registered modest seismicity with thermal anomalies.

Other
In Guatemala, Fuego generated up to six explosions per hour with ash to 737 m, audible booms, and incandescent ejecta. Nearby, Santa Maria produced ash to 900 m, up to three explosions per hour, and incandescent rockfalls.

Source: Smithsonian/USGS GVP Daily Volcanic Activity Report (23 December 2025).

Activity Summary for 23 December 2025