And the US snooper aircraft would immediately tell CNN and we would all know about it?
Well under Obama the aircraft would be defunded due to its massive carbon footprint and ugly military appearance. Currently the information won’t be officially leaked for another 3-5 days.
Somehow , officially or unofficially, yes.
There would be plenty of civilian detectors that would know about the radiation spike and would share that information with anybody who cared to broadcast it.
That's one of the reasons the Soviets couldn't cover up Chernobyl.
The big difference here though, is Chernobyl actually was a nuclear event and this was a regular old earthquake.