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Sangay Volcanic Ash Advisory: ash plume to 19,000 ft (5,800 m) as of Nov 5, 11:30 UTC

Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Washington warned of a volcanic ash plume rising to an estimated 19000 ft (5800 m), or flight level 190.
Original VAAC bulletin:

FVXX24 at 11:54 UTC, 05/11/26 from KNES
VA ADVISORY
DTG: 20261105/1151Z

VAAC: WASHINGTON

VOLCANO: SANGAY 352090
PSN: S0200 W07820

AREA: ECUADOR

SOURCE ELEV: 17342 FT AMSL

ADVISORY NR: 2026/763

INFO SOURCE: GOES-19. VONA. WEBCAM. NWP MODELS.
GEOPHYSICAL INST. 

ERUPTION DETAILS: VA EM OBSD

OBS VA DTG: 05/1130Z

OBS VA CLD: SFC/FL190 S0200 W07820 - S0201 W07820
- S0218 W07902 - S0207 W07904 - S0200 W07820 MOV
W 15KT 

FCST VA CLD +6HR: 05/1730Z SFC/FL190 S0200 W07820
- S0201 W07820 - S0214 W07855 - S0200 W07856 -
S0200 W07820 

FCST VA CLD +12HR: 05/2330Z SFC/FL190 S0157
W07856 - S0200 W07820 - S0201 W07819 - S0214
W07854 - S0157 W07856 

FCST VA CLD +18HR: 06/0530Z SFC/FL190 S0157
W07856 - S0200 W07820 - S0201 W07820 - S0213
W07856 - S0157 W07856 

RMK: VA EM OBSD IN SAT AND WEBCAM. VA CLD EXTD
APRX 45 NM WSW FM SUMMIT. VONA RECEIVED. NWP MDL
FCST WINDS FM E THRU T+18HRS. ...ZENG

NXT ADVISORY: WILL BE ISSUED BY 20261105/1745Z
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Ibu Volcanic Ash Advisory: ash plume to 7,000 ft (2,100 m) as of Nov 5, 06:39 UTC

Explosive activity continues. The Volcanic Ash Advisory Center (VAAC) Darwin warned of a volcanic ash plume rising to an estimated 7000 ft (2100 m), or flight level 070, and moving at 05 kts in SW direction.
Original VAAC bulletin:

FVAU03 at 06:39 UTC, 05/11/26 from ADRM
VA ADVISORY
DTG: 20261105/0640Z
VAAC: DARWIN
VOLCANO: IBU 268030
PSN: N0129 E12738
AREA: INDONESIA
SOURCE ELEV: 1325M AMSL
ADVISORY NR: 2026/1258
INFO SOURCE: HIMAWARI-9, CVGHM
ERUPTION DETAILS: VA TO FL070 LAST REPORTED AT 05/0600Z
EST VA DTG: 05/0620Z
EST VA CLD: SFC/FL070 N0129 E12744 - N0052 E12708 - N0126
 E12646 - N0135 E12740 MOV SW 05KT
FCST VA CLD +6 HR: 05/1220Z SFC/FL070 N0129 E12744 - N0050
 E12713 - N0120 E12650 - N0135 E12740
FCST VA CLD +12 HR: 05/1820Z SFC/FL070 N0129 E12744 - N0050
 E12713 - N0120 E12650 - N0135 E12740
FCST VA CLD +18 HR: 06/0020Z SFC/FL070 N0135 E12740 - N0128
 E12745 - N0050 E12713 - N0120 E12650
RMK: VA NOT IDENTIFIABLE ON CURRENT SATELLITE IMAGERY DUE TO
 MET CLOUD. REGULAR DISCRETE EMISSIONS ARE ONGOING. VA HEIGHT
 AND MOV BASED ON SATELLITE IMAGERY, GROUND REPORTS AND MODEL
 GUIDANCE.
NXT ADVISORY: NO LATER THAN 20261105/1240Z=
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Semeru volcano (East Java, Indonesia): pyroclastic flow today

Pyroclastic flow from Semeru this morning (image: Pusat Vulkanologi dan Mitigasi Bencana Geologi)

A strong eruption occurred at the volcano this morning.

At about 09:30 AM local time, a pyroclastic flow descended over the southern slope. The block-and-ash flow has been likely triggered by the gravitational collapse of the lava dome in the inner summit crater as well as the lava flow on the steep slope of the volcano. It also formed secondary ash columns (so-called phoenix clouds), as can be seen in the image, and rose about 700 meters above the summit.

Pyroclastic flows are deadly, turbulent hot avalanche of lava rock fragments of all sizes embedded in a mixture of turbulent gas and ash racing down slopes.

Beyond the 8-km zone, people should also stay at least 500 meters away from the riverbanks along Besuk Kobokan, as this area remains at risk from potential expansion of pyroclastic density currents and lava flows, which may travel up to 13 km from the summit.

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Reventador Volcanic Ash Advisory: ash plume to 15,000 ft (4,600 m) as of Nov 4, 20:10 UTC

Mild explosive activity continues intermittently. The Volcanic Ash Advisory Center (VAAC) Washington reported sporadic emissions of volcanic ash.
Original VAAC bulletin:

FVXX21 at 20:47 UTC, 04/11/26 from KNES
VA ADVISORY
DTG: 20261104/2045Z

VAAC: WASHINGTON

VOLCANO: REVENTADOR 352010
PSN: S0004 W07739

AREA: ECUADOR

SOURCE ELEV: 11686 FT AMSL

ADVISORY NR: 2026/1167

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

ERUPTION DETAILS: INTMT VA EMS

OBS VA DTG: 04/2010Z

OBS VA CLD: SFC/FL150 N0001 W07746 - S0004 W07739
- S0005 W07740 - S0000 W07747 - N0001 W07746 MOV
NW 10KT 

FCST VA CLD +6HR: 05/0200Z SFC/FL150 S0001 W07747
- S0004 W07739 - S0005 W07740 - S0002 W07748 -
S0001 W07747 

FCST VA CLD +12HR: 05/0800Z SFC/FL150 S0004
W07748 - S0004 W07739 - S0005 W07739 - S0006
W07748 - S0004 W07748 

FCST VA CLD +18HR: 05/1400Z SFC/FL150 S0004
W07748 - S0004 W07740 - S0005 W07739 - S0006
W07748 - S0004 W07748 

RMK: VONA RCVD FR VA EMS. VA EMS OBS IN WEBCAM
AND STLT IMG EXT APRX 10NM NW FM SUMMIT. MVMT TO
SHIFT W BY T+12. FCST BASED ON VONA, STLT AND MDL
WINDS. ...GATLING

NXT ADVISORY: WILL BE ISSUED BY 20261105/0245Z