![](\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2023\/10\/231026_goes18_dustRGB_Anaikchak_AK_resuspended_ash_anim.gif\")
<\/a>GOES-18 Dust RGB images [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>GOES-18\u00a0(GOES-West)<\/em>\u00a0Dust RGB<\/strong><\/a>\u00a0images\u00a0(above)<\/strong><\/em> showed a plume of resuspended volcanic ash (brighter shades of violet) from Mount Aniakchak<\/strong><\/a>, which was being lofted by strong SE winds — gusting as high as 45 knots at Port Heiden — and transported NW across Bristol Bay on 26 October 2023. A Volcanic Ash Advisory was issued at 2130 UTC (below)<\/strong><\/em>, cautioning pilots of hazardous airborne ash between the Surface and an altitude of 3000 feet.<\/p>\n GOES-18 Dust RGB image at 2130 UTC, with a cursor sample of the Volcanic Ash Advisory [click to enlarge]<\/p><\/div>While a subtle signature of the plume was also evident in GOES-18 Ash RGB<\/strong><\/a> imagery, it was a bit more obvious in the Dust RGB (below)\u00a0<\/strong><\/em>\u2014 both RGBs use the same spectral bands and spectral band differences, but the individual RGB components are scaled differently (so an examination of both is advised, in order to determine which RGB is best to track this type of ash-related feature).<\/p>\n<\/a>