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).
Who wrote the movie limitless 2011? The KGB Agent answer: The writers of Limitless (2011) are Leslie Dixon for screenplay, and Alan Glynn for the novel. Main stars are Bradley Cooper, Anna Friel and Abbie Cornish.