Consider a region that has four accelerometer stations: A, B, C, and D. Each station is equipped with an on-site earthquake early warning system that can alarm based on procressing 3 seconds duration of measured P-waves. An earthquake occurs that is detected by all four stations. Station C detects the earthquake third, with the onset of Swaves occurring 12 seconds after the onset of P-waves. Assume the average S-wave and P-wave velocities are 3 km/sec and 5 km/sec respectively. Which could occur first, earthquake early warning alarm at station C, or identification of the earthquake's epicenter? Why