Satellite signatures of a bolide over the Canada/US border
Upper-level Water Vapor (6.2 µm) images with an overlay of GLM Flash Extent Density, from GOES-18 (left) and GOES-16 (right) [click to play MP4 animation]
Since the bright fireball occurred at a high altitude as a meteor was entering the Earth’s atmosphere, there was a notable shift in the GLM-detected signatures — with the apparent location over southwest Alberta as viewed from GOES-18, and over southeast British Columbia as viewed from GOES-16. With both satellites positioned over the Equator, a parallax-induced northward shift in apparent location would also need to be accounted for; this would bring the actual bolide location over far northwestern Montana (the blue arrow pointing southeastward on the AMS map).