“Earthquake size blast”? Literally, no, not at all. But an explosion large enough to shake buildings, yes that’s possible.
I have experience those in a war zone, just like many here on FR have. One such “explosion” was when a Navy 8” gun let loose about a half mile from my position. It fired over our heads. Talk about a surprise that scares the holy hell our of a person that also makes things around you vibrate.
Those wishing the Ukraine war will turn out to be WWIII will be seeing plenty of this if your dreams come true.
There was an estimated 30 kilotons of munitions stored at Toropets. For comparison, the Hiroshima yield was an estimated 16 kilotons of TNT. Of course, at Toropets not all of the explosions occurred at a single moment, but involved secondary and tertiary explosions over many hours. On one hand, the 30 kilotons figure might include bomb and missile components along with the explosive components (and maybe not all stockpiles were lost). On the other hand, modern explosives may have a higher yield than TNT.