I heard someone say that there was a “46% that the next quake would occur within 30 years”.
I also heard that 38.7% of all “statistics” are made up on the spot. Just like this one.
Perhaps talking about the Hayward Fault that runs under UC Berkeley. Has mega-quakes on average every 140 years. Last big one (called "The Great San Francisco Earthquake") happened in 1868. Due to happen any minute now. We've prepared for it by building wall-to-wall towns, colleges, hospitals, and freeways on top of it.