Examine the following seismogram. The horizontal scale is 1 cm = 3 minutes. Time marks area also shown on the seismogram as dots. The time marked by the arrow (>) is 14 hrs and 44 minutes 1 cm Time of P-wave arrival tp = hrs min .2 Time of S-wave arrival ts = hrs min .3 Time difference ts - tp = min .4 If the velocity of P-waves (Vp) is 480 km/minute and the velocity of S-waves (Vs) is 300 km/minute then calculate the epicentral distance (d) using the difference between the .(P- and S-wave arrival times (ts - tp (t,-t,) d = 1 1 Vp Epicentral distance (d) = km .5 .Calculate the origin time (to) for the earthquake o =t, - Origin time to = hrs min .6

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