It seems pretty circumstantial, and there were earlier reports of radioactivity and of military nuclear facilities in the area.
If it was a nuclear explosion, I would expect that to show up in the seismographic readings, as interpreted by experts. A lot of study has been put into telling the difference between the signatures of earthquakes or volcanoes and nuclear explosions, going back to the cold ar days.
I wouldn’t necessarily expect any officials to talk about it, however. Coverup mode seems to have become the standard reaction to this sort of thing.
Certainly only speculative at this point, but I’d like to see some trustworthy analysis of this story, if there’s such a thing as a government agent or scientist who can be trusted these days. They all seem to have fish to fry.
It would be a stroke of real genius to detonate a nuke in an area criss-crossed by earthquake faults from the entire Tibetan plateau and near a huge damn built only recently which holds back billions of gallons of water.
Zheesh!