Could this have been used against North Korea's nuclear program?
It sure was an amazing "coincidence" the way that an earthquake shook a certain mountain and happened to kill so many North Korean nuclear scientists and technicians.
Looks like this site keeps tracks of meteors / fireballs. not sure if there's a way to sort by size, but any event with a large number of witnesses should, in theory, be a pretty big chunk of rock / debris falling through the atmosphere.
amsmeteors.org/members/imo_view/browse_events