A building on solid rock would be the least shaky spot.
canada.com
A 31-ton drill yesterday began boring through the solid rock to create a rescue tunnel.
The Sun
Unless you have a heart of solid rock, you will cry buckets.
The Sun
Piles are concrete or steel columns hammered into the ground until they penetrate solid rock.
Christianity Today
When earthquake tremors hit solid rock, the rock simply shakes.
Smithsonian Mag