[familyop]

"On the other hand, we have no report of radioactive isotopes from the blast and satellites still failed to spot a new crater-like depression formed after the underground test."

...after a test in a horizontal tunnel that was 6,000 feet under ground?

[TigerLikesRooster]

Re #16

The crater could be shallow, but visible. At least wouldn't the height of (hill or mountain) change by a few meters.

By the way, are you sure that it was 6000 feet underground? That is 1,800 meters, which is really deep. The tunnel cannot be horizontal. The hill is merely 1,200 feet high.