On 27 August there was a pyroCb in Russia at 56.8 N 126.8 E. Himawari-8 detected the smoke plume and clouds around the fires, as well as the fire hot spots. Starting at 08:00 UTC on August 27, the animation below shows visible (.64 μm) on the left and shortwave IR (3.9 μm) on the right (click image to play animation). In the shortwave IR images the darker black to red pixels indicate very hot IR brightness temperatures exhibited by the fire source region.
Himawari-8 0.64 μm visible (left) and 3.9 μm shortwave IR (right) images (click to play animation)
Himawari-8 10.4 μm IR channel imagery the minimum cloud-top IR brightness temperatures could be found. The animation below, starting at 08:00 UTC on 27 August, shows that the pyroCb reached around -47.6 ºC (lime green color enhancement) around 10:30 UTC.
Himawari-8 10.4 μm IR images (click to play animation)