Shiveluch volcano (Kamchatka): strong ash and gas emissions reach W-NW Canada, dozen of flights are cancelled

Ash and gas emissions (bright pink) move across the Gulf of Canada towards western/northwestern Canada (image: NWS Juneau)

The increased ash and sulfur dioxide emissions from the volcano continue to travel eastward along vast stretches of the Gulf of Alaska.
The latest NWS Juneau satellite-based measurements of SO2 and fine ash concentrations in the atmosphere depict how particles gradually have been reaching the western and northwestern Canada, distant approx. 4,300 km from the volcano, and it appears to continue further towards the east.
Therefore, this situation led to disruption of several flights operated by Canadian North Airlines within the Yellowknife, Alaska, Northwest Territories, Northern British Columbia, and Alberta provinces due to poor visibility. Fine ash particles present a danger to aviation and in order to mitigate risk, precautions with air traffic must be taken.

The ongoing strong gas-steam-rich (so-called degassing) plumes and vulcanian-sized eruptions have been dominating the volcano over the past few days.

Satellite shows (in bright pink) the ash as it moves across the gulf. You can see different layers and the different speeds and directions it is taking. You can see the latest SIGMET/AIRMET at: https://t.co/3z3BciSYEC #akwx pic.twitter.com/SVeplIl9ki

— NWS Juneau (@NWSJuneau) April 14, 2023

Flight cancellations notification by Canadian North Airlines (image: Canadian North Airlines)