On 12/30/2025 8:12:24 AM, an earthquake occurred in Japan potentially affecting 1 thousand in MMI VI. The earthquake had Magnitude 5.5M, Depth:10km.
Okmok Volcano Volcanic Ash Advisory: NA
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=
Reventador Volcano Volcanic Ash Advisory: VA MOVG W to 17000 ft (5200 m)
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
Semeru Volcano Volcanic Ash Advisory: VA TO FL150 LAST REPORTED AT 29/1908Z EST VA DTG: 29/2140Z to 15000 ft (4600 m)
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=