• The epicenter of the 2011 Japan earthquake was just offshore of Sendai.
  • This is where the Pacific Plate plunges into a subduction zone.
  • The earthquake had a relatively shallow depth of 20 miles (32 km) How do scientists find an earthquake epicenter?
  • One seismogram indicates the distance to the epicenter.
  • The longer the time is between the P-and S-wave arrivals, the further away the earthquake was from the seismograph.
  • The interception of the three circles is the epiccenter.
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