In an earthquake, the motion is at surface, ... Back in '92 there was a 5.6 or 5.7 earthquake not far from Yucca, and there were scientists in a tunnel near the epicenter and they didn't even know an earthquake happened.  -   Allen Benson     Quotes
In an earthquake, the motion is at surface, ... Back in '92 there was a 5.6 or 5.7 earthquake not far from Yucca, and there were scientists in a tunnel near the epicenter and they didn't even know an earthquake happened. Allen Benson
 Earthquake