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Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Washington warned of a volcanic ash plume rising to an estimated 21000 ft (6400 m), or flight level 210.
Original VAAC bulletin:

FVXX25 at 18:21 UTC, 28/10/26 from KNES
VA ADVISORY
DTG: 20261028/1818Z

VAAC: WASHINGTON

VOLCANO: POPOCATEPETL 341090
PSN: N1901 W09837

AREA: MEXICO

SOURCE ELEV: 17693 FT AMSL

ADVISORY NR: 2026/369

INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. 

ERUPTION DETAILS: CONTINUOUS VA EMS.

OBS VA DTG: 28/1806Z

OBS VA CLD: SFC/FL210 N2021 W09821 - N2010 W09754
- N1901 W09835 - N1901 W09838 - N2021 W09821 MOV
NE 10KT 

FCST VA CLD +6HR: 29/0000Z SFC/FL210 N2051 W09823
- N2038 W09746 - N1901 W09834 - N1902 W09838 -
N2051 W09823 

FCST VA CLD +12HR: 29/0600Z SFC/FL210 N2049
W09819 - N2036 W09742 - N1900 W09835 - N1902
W09838 - N2049 W09819 

FCST VA CLD +18HR: 29/1200Z SFC/FL210 N2051
W09817 - N2037 W09736 - N1900 W09834 - N1901
W09838 - N2051 W09817 

RMK: VA OBS IN SAT AND WEBCAM EXT UP TO 80 NM NE
FM SUMMIT. OBS VA FL ESTD FM NWP MDLS AND WEBCAM.
FL MVMT FCST TO PERSIST THRU T+18 HRS. ...CLARK

NXT ADVISORY: WILL BE ISSUED BY 20261029/0015Z

The Volcanic Ash Advisory Center (VAAC) Darwin issued the following bulletin.
Original VAAC bulletin:

FVAU02 at 15:00 UTC, 28/10/26 from ADRM
VA ADVISORY
DTG: 20261028/1510Z
VAAC: DARWIN
VOLCANO: SEMERU 263300
PSN: S0806 E11255
AREA: INDONESIA
SOURCE ELEV: 3657M AMSL
ADVISORY NR: 2026/1233
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: ERUPTION REP FM GND AT 28/1151Z
EST VA DTG: 28/1450Z
EST VA CLD: SFC/FL150 S0804 E11258 - S0824 E11305 - S0834
 E11252 - S0822 E11238 - S0803 E11252 MOV S 05KT
FCST VA CLD +6 HR: 28/2050Z SFC/FL150 S0803 E11302 - S0826
 E11301 - S0828 E11242 - S0811 E11234 - S0757 E11252
FCST VA CLD +12 HR: 29/0250Z SFC/FL150 S0801 E11259 - S0812
 E11300 - S0822 E11236 - S0808 E11224 - S0755 E11234
FCST VA CLD +18 HR: 29/0850Z SFC/FL150 S0805 E11303 - S0814
 E11255 - S0810 E11234 - S0754 E11235 - S0749 E11249 - S0749
 E11249
RMK: VA NOT IDENTIFIABLE ON RECENT SATELLITE IMAGERY DUE TO
 MET CLOUD. REGULAR GROUND REPORTS INDICATE INTERMITTENT
 ERUPTIONS ARE ONGOING. VA HEIGHT AND MOVEMENT BASED ON
 SATELLITE IMAGERY, GROUND REPORTS AND MODEL GUIDANCE.
NXT ADVISORY: NO LATER THAN 20261028/2110Z=

Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Washington warned of a volcanic ash plume rising to an estimated 15000 ft (4600 m), or flight level 150.
Original VAAC bulletin:

FVXX21 at 11:35 UTC, 28/10/26 from KNES
VA ADVISORY
DTG: 20261028/1132Z

VAAC: WASHINGTON

VOLCANO: REVENTADOR 352010
PSN: S0004 W07739

AREA: ECUADOR

SOURCE ELEV: 11686 FT AMSL

ADVISORY NR: 2026/1134

INFO SOURCE: GOES-19. WEBCAM. NWP MODELS. 

ERUPTION DETAILS: FRQT VA EMS

OBS VA DTG: 28/1050Z

OBS VA CLD: SFC/FL150 S0004 W07802 - S0004 W07739
- S0007 W07738 - S0022 W07757 - S0004 W07802 MOV
SW 5KT 

FCST VA CLD +6HR: 28/1700Z SFC/FL150 S0005 W07739
- S0007 W07738 - S0029 W07756 - S0014 W07805 -
S0005 W07739 

FCST VA CLD +12HR: 28/2300Z SFC/FL150 S0005
W07739 - S0007 W07738 - S0028 W07801 - S0009
W07809 - S0005 W07739 

FCST VA CLD +18HR: 29/0500Z SFC/FL150 S0001
W07807 - S0004 W07738 - S0006 W07738 - S0018
W07805 - S0001 W07807 

RMK: FRQT VA EMS SEEN ON WEBCAM AND DETECTED ON
STLT IMG MOVG SW FM SUMMIT EXT APPRX 20NMI. NWP
MDLS FCST GEN SW MVMT THRU T+18. ...BUTLER

NXT ADVISORY: WILL BE ISSUED BY 20261028/1730Z