Page 432 - Laboratory Manual in Physical Geology

E. 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.

1. What is the S-minus-P time interval of the earthquake?

2. How far from the earthquake’s epicenter is the Houston recording station located?

3. REFLECT & DISCUSS 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?

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