Answer :
Final answer:
Without a specific travel-time graph or the average velocity of P-waves for the region, we cannot accurately determine the P-wave travel time or the time of the earthquake from the provided options.
Explanation:
When the P-wave arrival time is 10:10:10 and the epicenter is 4,500 km away, to determine the P-wave travel time and the time of the earthquake, one would typically use a travel-time graph which shows the relationship between the distance from the epicenter and the travel times of seismic waves, such as P-waves and S-waves. According to such graphs, with a known distance, one can read off the travel time for the P-wave and subtract this from the arrival time to calculate the earthquake's origin time. However, without a specific travel-time graph provided for the P-wave speed appropriate to the context, the travel time cannot be determined accurately here.
Therefore, without additional information like the appropriate travel-time graph or the average velocity of the P-waves for the Earth's crust in the region of the earthquake, which could be used to calculate the travel time, we can only speculate on the possible answer. Additionally, it is essential to ensure that the values provided in potential answer choices make sense in terms of the distance and speeds involved, adhering to the provided reference data regarding seismic wave travel. In this scenario, as specific travel-time data is not provided, we are unable to select a correct answer from the options given.
