I’m guessing that the nuclear detection systems could know the difference between an earthquake and a nuclear detonation.
Not that they’d ever share the info with us and after COVID-19(84) I don’t trust much of anything these days.
Long ago it was Vela Uniform in conjunction with Vela Hotel and Vela Sierra.
>>I’m guessing that the nuclear detection systems could know the difference between an earthquake and a nuclear detonation.
The recorded depths are too deep for nuclear tests.