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pure and applied geophysics

, Volume 154, Issue 3–4, pp 575–591 | Cite as

Relation between the Subducting Plate and Seismicity Associated with the Great 1964 Alaska Earthquake

  • R. von Huene
  • D. Klaeschen
  • J. Fruehn

Abstract

—Tectonic studies of the great 1964 Alaska earthquake have underappreciated the nature of the subducted plate in influencing seismicity. We compare seismological observations in the Prince William and Kodiak areas that ruptured during this earthquake with the corresponding morphology and structure of the subducting plate. The upper plate geology (Prince William Terrane) and velocity structure are the same in both areas. In the Prince William area where the Yakutat Terrane subducted, the energy released and coupling were stronger than above the Kodiak subduction zone where thick trench sediment subducts. The conjecture that lower plate character or the amount of subducted sediment affects coupling helps explain variability in seismology, geodetic inversions and the horizontal velocity of GPS stations.

Key words: Alaska earthquakes, tectonics, earthquake segmentation. 

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Copyright information

© Birkhäuser Verlag Basel, 1999

Authors and Affiliations

  • R. von Huene
    • 1
  • D. Klaeschen
    • 1
  • J. Fruehn
    • 2
  1. 1.GEOMAR Research Center, Wischhofstr. 1-3, D-24148 Kiel, Germany.DE
  2. 2.Bullard Laboratories, Madingley Rise, Madingley Road, GB-Cambridge CB3 OEZ, Great Britain.GB

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