Yes, true...

BUT...often earthquakes upward of 7 plus on the richter scale do set off other small quakes and shifting. So depending on the size of their weapon it can melt into the background seismic activity.

Naturally, a strong Afghanistan or Turkish earthquake like the recent ones would provide much cover for many neighboring countries.

In fact, if you want to see how cynical I really am ;-) - there is even the potential for faking an earthquake while detonating an underground nuke - and pulverizing a remote village or two ahead of time with bulldozers and planting casualties too - all to capture on film and release to the media. In areas we can't immediate check background radiation - this is more feasible than it may first appear.

That's why remote space-based radiation detection has been on DTRAs and DARPAs solicitation research projects for almost a decade now.

Not an easy project to fulfill.

It's a sick world...

SDAI-Tech1