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Japan Sea Central Region Tsunami of May 26, 1983 A Reconnaissance Report (1984) / Chapter Skim
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THE EARTHQUAKE AND THE TSUNAMI
Pages 2-5

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From page 2...
... The earthquake occurred at a focal depth of approximately 20 km along a fault line running north by northeast to south by southwest. The orientation of the fault line is indicated by the major axis of the aftershock ellipse, which is also shown in Figure l.
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From page 3...
... Longitude 0)
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From page 4...
... For a fault plane inclination o of 30 , this yields a vertical offset component of 2 to 5 m. The displacement was positive over most of the aftershock area, with slight subsidence occurring only in the eastern portions of the aftershock ellipse.
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From page 5...
... Longitude 129-E I 4i •H 4J JAPAN _S E'A - ''<•«•• '• 'Jff-OSHIMA. " FIGURE 2 The earthquake area based on tsunami arrival times.
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Key Terms

  • fault plane
  • sea central
  • central region
  • region earthquake
  • fault line

  • aftershock ellipse
  • plane appears
  • vertical offset
  • wave propagation
  • wave arrival

  • line running
  • reverse wave
  • earthquake occurred
  • tide gauge
  • slight subsidence

  • surrounding tide
  • plane inclination
  • eastern portions
  • largest earthquakes
  • gauge stations

  • occurred offshore
  • historical earthquakes
  • assuming static
  • running north
  • major axis

  • offset component
  • subsidence occurring
  • kinjuro kajiura
  • focal depth
  • propagation based


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