EarthSci 6- Volcanoes
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EarthSci 6- Volcanoes

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EarthSci 6- Volcanoes Presentation Transcript

  • 1. Focus, Epicenter, and Fault
  • 2. Elastic Rebound Hypothesis
  • 3. Seismograph
  • 4. Earth’s Interior Showing P and S Wave Paths
  • 5. Seismogram
  • 6. Measuring EarthquakesLocating an Earthquake Earthquake Distance • The epicenter is located using the difference in the arrival times between P and S wave recordings, which are related to distance. Earthquake Direction • Travel-time graphs from three or more seismographs can be used to find the exact location of an earthquake epicenter. Earthquake Zones • About 95 percent of the major earthquakes occur in a few narrow zones.
  • 7. Locating an Earthquake
  • 8. Location You Found Actual Location