Imagine that an earthquake occurred this morning. The first P-waves of the earth
ID: 283037 • Letter: I
Question
Imagine that an earthquake occurred this morning. The first P-waves of the earthquake were recorded at a recording station in Houston at 6:12.6 a.m. and the first S-waves arrived at the same Houston station at 6:17.1 a.m. Use the travel time graph (FIGURE 16.5) to determine an answer for each question below. What is the S-minus-P time interval of the earthquake? How far from the earthquakes epicenter is the Houston recording station located? You have determined the distance (radius of a circle on a map) between Houston and the earthquake epicenter. What additional data would you require to determine the location of the earthquake's epicenter (point on a map), and how would you use the data to locate the epicenter?Explanation / Answer
1) P-waves travel faster than S-waves and so the farther you are from the epicenter, the greater the lag between the arrival times.
2) It may be1400km
3) It is need to etermine the arrival times of the p-wave and s-wave. And then calculate the time difference. S-wave arrival time minus P-wave arrival time equals time difference. Ploting them on Earthquake Time Travel Graph using travel time and epicenter distence axis.