Estimate was 30KT stored there. Most of it went up, even in the hardened bunker sections.
The north west section was completely obliterated. A lot of that was just out in the open so I wouldn’t be surprised if that was the massive fireball.
For reference, Hiroshima was 15KT but obviously this was cooking off for a long time after that big blast.
Very nice package. No mention of striking inside Russia unfortunately. :(