The eruption of Mt. Shisaldin late in the day on 15 September (Blog Post) was accompanied by lightning. Shishaldin’s latitude is 54.75^oN, very near the northern edge of the GOES-18 Geostationary Lightning Mapper’s (GLM’s) field of view, as shown in this Quick Guide; although most of Alaska is not sampled by the GLM instrument, parts of the Aleutians are, including the land surrounding Shishaldin. The toggle below shows the SO₂ RGB at 0220 UTC and 1-minute Flash Extent Density at 0219 UTC on 16 September 2023. This case is a good reminder that GLM can give lightning information, even in Alaska!

Similarly, GLM observed lightning at 0151 and 0152 UTC 0n 16 September 2023, as shown below.

GLM imagery for this blog post was created using CSPP’s Gridded GLM software that operates on Level 2 LFCA files; resultant GLMF files were then placed into AWIPS.

—————
Free Secure Email – Transcom Sigma
Transcom Hosting
Transcom Premium Domains