The travel velocity of these two wave types is not the same (P-waves are faster than S-waves). Thus, if there is an earthquake somewhere, the first waves that arrive are P-waves. In essence, the gap in P-wave and S-wave arrival gives a first estimate of the distance to the earthquake.
With the mysterious U.S. Senator Eddie Morra (Bradley Cooper) providing him with a second drug to counteract NZT's deadly side effects, Brian uses his enhanced abilities to help FBI agent Rebecca Harris (Jennifer Carpenter).
On Limitless, deadbeat Brian Finch (Jake McDorman) is given the NZT-48 drug and it unlocks 100% of his brain. Brian has complete recall of whatever heâs learned at any point in his life, either consciously or subconsciously.