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).
Senate Guards would continue to stand watch over the Senate and Republic Executive buildings. A special honor guard was present at the funeral of the murdered senator, Onaconda Farr. However, the Coruscant Security Force was instead called in and the investigation was led by Lieutenant Tan Divo.