Dubman I’ve seen this said in relation to a clip of a similar explosion from Sunday night, this could be the same one but from a different angle as there’s no timeframe. Thermobaric missiles are fired off the back of MLRS and land in multiple hits across a wide area. The explosion here is most likely a direct hit on weapons storage either by a Kalibr or Biryuza cruise missile. Thermobaric sounds more sinister but their blast radius is nothing like this.
Edit: these are the units used by the Russians