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).
Jessica De Gouw as Helena Bertinelli in Arrow. The Helena Bertinelli version of Huntress appears in the Arrow live-action television series, played by Jessica De Gouw. Introduced in the episodes Muse of Fire and Vendetta, she is depicted as the daughter of high-profile mobster Frank Bertinelli.