(Solved): into 10-second intervals. (Note: To avoid confusion involving time zones and changes to and from da ...

into 10-second intervals. (Note: To avoid confusion involving time zones and changes to and from daylight savings time, seismogram times are standardized to Greenwich mean time (GMT).) Recognizing Seismic Wave Arrivals: Each seismic wave has a distinctive combination of wave amplitude and frequency. The key to successful epicenter location is determining the arrival times of each of the different waves accurately. Arrival of a new wave is indicated by a sudden change in the amplitude and frequency, as shown by the arrows in the inset in Figure 16.9 . To practice your seismogram reading skills, determine the time of arrival of the - first wave indicated in the inset. - second wave in the inset. - first wave associated with this earthquake. - last wave associated with this earthquake.