Overall Green alert Volcanic eruption for Great Sitkin
in United States

Volcano Ash Advisories for air traffic

Although Volcano Ash Advisories (VAAC) are not intended for assessing humanitarian impact, the observations of the plume are relevant for understanding local impact. The actual impact (like ash fall) depends on the type of eruption and is not known.

Click on the messages list to visualize on the right the detailed text.




Volcanic Ash Advisory issued on 2021-05-26 at 19:32 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Volcano erupted at 0504 utc.
  • Volcanic ash becoming dif and dsiptg.

Original Message :

Received FVAK21 at 19:39 UTC, 26/05/21 from PAWU
VAAAK1
VA ADVISORY
DTG: 20210526/1932Z
VAAC: ANCHORAGE
VOLCANO: GREAT SITKIN 311120
PSN: N5205 W17608
AREA: ALEUTIAN ISLANDS
SUMMIT ELEV: 5709 FT [1740 M]
ADVISORY NR: 2021/005
INFO SOURCE: HIMAWARI/GOES
AVIATION COLOR CODE: ORANGE
ERUPTION DETAILS: VOLCANO ERUPTED AT 0504 UTC
OBS VA DTG: 26/1932Z
OBS VA CLD: VA NOT IDENTIFIABLE FROM SATELLITE
FCST VA CLD +6HR: NO VA EXP
FCST VA CLD +12HR: NO VA EXP
FCST VA CLD +18HR: NO VA EXP
RMK: VA BCMG DIF AND DSIPTG.
NXT ADVISORY: NO FURTHER ADVISORIES
JO MAY 2021 AAWU
Volcanic Ash Advisory issued on 2021-05-26 at 13:57 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Volcano erupted at 05:04 utc.
  • Volcanic ash activity visible on geostationary operational environmental satellite 17 and himawari satellite ash imagery.

Original Message :

Received FVAK21 at 14:03 UTC, 26/05/21 from PAWU
VAAAK1
VA ADVISORY
DTG: 20210526/1357Z
VAAC: ANCHORAGE
VOLCANO: GREAT SITKIN 311120
PSN: N5205 W17608
AREA: ALEUTIAN ISLANDS
SUMMIT ELEV: 5709 FT [1740 M]
ADVISORY NR: 2021/004
INFO SOURCE: HIMAWARI/GOES/AVO/PILOT REPORT
AVIATION COLOR CODE: RED
ERUPTION DETAILS: VOLCANO ERUPTED AT 0504Z.
OBS VA DTG: 26/1357Z
OBS VA CLD: FL040/FL200 N5904 W16815 - N5325 W16636 - N5149 W17130 - N5837 W17220 - N5849 W16827 - N5904 W16815 MOV NE 25KT.
FCST VA CLD +6HR: 26/1957Z FL040/FL200 N5847 W16822 - N5316 W16444 - N5119 W17124 - N5839 W17239 - N5856 W16823 - N5847 W16822 - N5847 W16822.
FCST VA CLD +12HR: 27/0157Z NO VA EXP.
FCST VA CLD +18HR: 27/0757Z NO VA EXP.
RMK: VA ACTIVITY VISIBLE ON GOES 17 AND HIMAWARI SATELLITE ASH IMAGERY.
NXT ADVISORY: WILL BE ISSUED BY 20210526/1957Z
KH MAY 2021 AAWU
Volcanic Ash Advisory issued on 2021-05-26 at 11:26 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Initial eruption time may 26 05:04 utc.
  • Volcanic ash activity visible on geostationary operational environmental satellite 17 and himawari satellite ash imagery.

Original Message :

Received FVAK21 at 11:31 UTC, 26/05/21 from PAWU
VAAAK1
VA ADVISORY
DTG: 20210526/1126Z
VAAC: ANCHORAGE
VOLCANO: GREAT SITKIN 311120
PSN: N5205 W17608
AREA: ALEUTIAN ISLANDS
SUMMIT ELEV: 5709 FT [1740 M]
ADVISORY NR: 2021/003
INFO SOURCE: HIMAWARI/GOES/POES/AVO/PILOT REPORT
AVIATION COLOR CODE: RED
ERUPTION DETAILS: INITIAL ERUPTION TIME MAY 26 0504Z.
OBS VA DTG: 26/1126Z
OBS VA CLD: FL030/FL170 N5540 W16927 - N5130 W17044 - N5119 W17352 - N5521 W17309 - N5540 W16927 - N5540 W16927 MOV ENE 30KT.
FCST VA CLD +6HR: 26/1726Z FL030/FL170 N5646 W16713 - N5151 W16903 - N5111 W17302 - N5551 W17209 - N5644 W16720 - N5646 W16713 - N5646 W16713.
FCST VA CLD +12HR: 26/2326Z NO VA EXP.
FCST VA CLD +18HR: 27/0526Z NO VA EXP.
RMK: VA ACTIVITY VISIBLE ON GOES 17 AND HIMAWARI SATELLITE ASH IMAGERY.
NXT ADVISORY: WILL BE ISSUED BY 20210526/1726Z
KH MAY 2021 AAWU
Volcanic Ash Advisory issued on 2021-05-26 at 11:06 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Initial eruption time may 25 05:04 utc.
  • Volcanic ash activity visible on geostationary operational environmental satellite 17 and himawari satellite ash imagery.

Original Message :

Received FVAK21 at 11:24 UTC, 26/05/21 from PAWU
VAAAK1
VA ADVISORY
DTG: 20210526/1106Z
VAAC: ANCHORAGE
VOLCANO: GREAT SITKIN 311120
PSN: N5205 W17608
AREA: ALEUTIAN ISLANDS
SUMMIT ELEV: 5709 FT [1740 M]
ADVISORY NR: 2021/002
INFO SOURCE: HIMAWARI/GOES/AVO/PILOT REPORT
AVIATION COLOR CODE: RED
ERUPTION DETAILS: INITIAL ERUPTION TIME MAY 25 0504Z.
OBS VA DTG: 26/1106Z
OBS VA CLD: FL030/FL170 N5540 W16927 - N5130 W17044 - N5119 W17352 - N5521 W17309 - N5540 W16927 - N5540 W16927 MOV ENE 30KT.
FCST VA CLD +6HR: 26/1706Z FL030/FL170 N5646 W16713 - N5151 W16903 - N5111 W17302 - N5551 W17209 - N5644 W16720 - N5646 W16713 - N5646 W16713.
FCST VA CLD +12HR: 26/2306Z NO VA EXP.
FCST VA CLD +18HR: 27/0506Z NO VA EXP.
RMK: VA ACTIVITY VISIBLE ON GOES 17 AND HIMAWARI SATELLITE ASH IMAGERY.
NXT ADVISORY: WILL BE ISSUED BY 20210526/1706Z
KH MAY 2021 AAWU
Volcanic Ash Advisory issued on 2021-05-26 at 05:33 UTC.

    Key information extracted from original VAA message :


    Aviation Colour Code :  


  • Volcano erupted at 05:04 utc.
  • Volcano erupted at 05:04 utc volcanic ash evident on satellite imagery.

Original Message :

Received FVAK21 at 05:41 UTC, 26/05/21 from PAWU
VAAAK1
VA ADVISORY
DTG: 20210526/0533Z
VAAC: ANCHORAGE
VOLCANO: GREAT SITKIN 311120
PSN: N5205 W17608
AREA: ALEUTIAN ISLANDS
SUMMIT ELEV: 5709 FT [1740 M]
ADVISORY NR: 2021/001
INFO SOURCE: GOES/AVO/PILOT REPORT
AVIATION COLOR CODE: RED
ERUPTION DETAILS: VOLCANO ERUPTED AT 0504Z.
OBS VA DTG: 26/0533Z
OBS VA CLD: SFC/FL150 N5357 W17211 - N5212 W17622 - N5136 W17608 - N5146 W17313 - N5357 W17211 MOV ENE 45KT.
FCST VA CLD +6HR: 26/1133Z SFC/FL150 N5550 W16959 - N5212 W17620 - N5133 W17604 - N5132 W17039 - N5550 W16959 - N5550 W16959.
FCST VA CLD +12HR: 26/1733Z NO VA EXP.
FCST VA CLD +18HR: 26/2333Z NO VA EXP.
RMK: VOLCANO ERUPTED AT 0504Z. VA EVIDENT ON SATELLITE IMAGERY.
NXT ADVISORY: WILL BE ISSUED BY 20210526/1133Z
BL MAY 2021 AAWU