Closer Google maps view of the same airfield, labeled Aerodrom Kubinka. In the undated but undoubtedly not very recent google satellite image, lots of military aircraft are visible parked in the area where the fire indicator near the apron appears on the FIRMS map
https://files.mastodon.social/media_attachments/files/114/465/142/946/042/772/original/939c1d726af88a08.png