Eruption of Klyuchevskaya on the Kamchatka PeninsulaJMA Himawari-9 Ash RGB images created using Geo2Grid (above) showed the complex transport of Kyluchevskaya volcanic plumes — which were a mixture of ash (shades of pink to red-orange) and SO2 (brighter shades of yellow) — during the 3-day period from 31 October to 02 November 2023. Much of the transport was influenced by a middle-tropospheric closed low that was progressing from Kamchatka toward the Aleutian Islands (500 hPa analyses).
GOES-18 (GOES-West) Air Mass RGB images (below) also depicted the volcanic plume — the portions that were dominated by SO2 exhibited brighter shades of pink (since the Red component of this RGB uses the 7.3 µm spectral band, which is sensitive to SO2 absorption). Volcanic Ash Advisories cautioned aviation interests of ash extending to altitudes of 36000 ft.While there were very few Pilot Reports (PIREPs) in the general vicinity of the volcanic plume — since aircraft were wisely avoiding the risk of an ash encounter — there were 3 PIREPs that mentioned Volcanic Ash (VA) (below). One of the more explosive events during this prolonged eruption period began around 0220 UTC on 01 November. Radiometrically-retrieved Ash Height and Ash Loading products from the NOAA/CIMSS Volcanic Cloud Monitoring site are shown below — which indicated that the resulting ash-rich volcanic cloud reached heights of 10-12 km.