Arguably had a 250kt device, judging by seismic data, although they may have killed a lot of people involved by detonating it? I'm just going by what is in the

Arguably had a 250kt device, judging by seismic data, although they may have killed a lot of people involved by detonating it? I'm just going by what is in the linked articles from Wikipedia, although the Wikipedia articles themselves don't mention it as it hasn't been independently announced as such by any non media organization.