The video is impressive.
Video of spectacular shockwave from explosion at military unit in Krasnoyarsk Krai of Russia pic.twitter.com/0yeg3hIb5F
— Liveuamap (@Liveuamap) August 5, 2019
Twelve people were hospitalized. Sections of Achinsk were evacuated.
Explosions of ammunition warehouses are not uncommon in Russia. This one is reported to have started with a fire.
Achinsk is southwest of the city of Krasnoyarsk. The nuclear plant at Zheleznogorsk is northeast, some distance away.
The shockwave shows up because the humidity of the air was just right for condensation in the expansion part of the wave. Any large explosion produces a mushroom cloud. It’s not nuclear, but I suppose there will be some conspiracy theorists who will latch onto this.
The Times article was from AP, as was the Washington Post article.