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EARTHQUAKES For this exercise you will need your textbook, a ruler, a compass, and a calculator. A map of the Midwest region will be provided. Figure 1 shows the recordings for the Feb. 10, 2005 Arkansas earthquake. Data are from recording stations MPH (Memphis, TN), UALR (Little Rock, AR), and SLM (St. Louis, MO). The arrows indicate the arrival times for the

`P`

wave and

`S`

waves at each station in UTC time (Coordinated Universal Time, formerly GMT). Using the 3 seismograms in Figure 1, complete the first three blank rows in Table 1.

`(1pt)`

Table 1. Plot the values of the

`S-P`

travel times (in seconds) on the line marked "

`S-P`

" in Figure 2. (1.5pts) Using your answers to the previous questions, estimate the distance from each station to the epicenter. Enter these three distances into the fourth row of Table 1. (1.5pts) On the map (Figure 3), the scale bar indicates 100 kilometers. Using a ruler (or a compass), extend the scale bar to 400 km . Use your new expanded scale bar and the compass to measure the distances from each of the three stations on the map. Using a compass, draw an arc of a circle (with appropriate radius) around each station on the map (Figure 3). (3pts) The location where the three arcs intersect is the epicenter of the earthquake. Do the three arcs intersect in a single point? Why or why not? (

`2pts`

) Yes, they do intryct. Thy intrect because musethe time abe calus it accurate iprcise to the carespondir Using the map coordinates on Figure 3, estimate the latitude and longitude of the epicenter to the nearest tenth of a degree. Write the coordinates here. (2pts)