Use the amplitude from the nearest station Show your work on figure 5 and write

Use the amplitude from the nearest station show your

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earthquake? Use the amplitude from the nearest station. Show your work on figure 5 and write your answer here . 6. Briefly summarize how you find the distance to an epicenter (in your words). 7. What else do you need to know to find the location of the epicenter? Figure 2 Time-travel graph for P and S waves. Use ruler or other straight edge to find time lag. Make sure ruler is vertical. 1
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GEOL 101 - Physical Geology – SCC 2 0 50 100 150 200 250 0 10 20 30 40 50 60 Distance (km) Time (seconds)
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GEOL 101 - Physical Geology – SCC Figure 3. Seismograms for an earthquake in the Pacific Northwest. Use ruler or other straight edge to get an accurate reading of arrival time and amplitude. Use the amplitude scale shown on this figure. 20 mm 20 mm 4:33:00 T ime Amplitude 4:32:30 4:33:30 4:34:00 4:32:15 20 mm ELLENSBURG 20 mm Time Amplitude PORTLAND 20 mm 20 mm Amplitude 4:33:00 Ti me 4:33:30 4:34:00 BELLINGHAM 4:32:30 4:33:00 4:32:30 4:33:30 4:34:00 4:32:15 4:32:15 Figure 4 . Map of seismograph locations. Use a compass to find the epicenter and make a star on the map at the epicenter. Use the SCALE below the map to set your compass the correct distance. 3
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SCALE 0 km 200 km 80 km GEOL 101 - Physical Geology – SCC Ellensburg Figure 5. Richter nomogram for determining magnitude of an earthquake. Show your work on this figure to receive full credit. Part 2. Magnitude and Intensity 4 400 km
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GEOL 101 - Physical Geology – SCC Earthquake Magnitude . Each earthquake has a single Magnitude that is determined by knowing the distance from a seismograph to an earthquake and observing the maximum signal amplitude recorded on the seismograph.To
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  • Fall '17
  • Cale Spoon

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