pure and applied geophysics

, Volume 144, Issue 3–4, pp 735–745 | Cite as

Modeling of the runup heights of the Hokkaido-Nansei-Oki tsunami of 12 July 1993

  • Katsuyuki Abe


The Hokkaido-Nansei-Oki earthquake (M w 7.7) of July 12, 1993, is one of the largest tsunamigenic events in the Sea of Japan. The tsunami magnitudeM t is determined to be 8.1 from the maximum amplitudes of the tsunami recorded on tide gauges. This value is larger thanM w by 0.4 units. It is suggested that the tsunami potential of the Nansei-Oki earthquake is large forM w . A number of tsunami runup data are accumulated for a total range of about 1000 km along the coast, and the data are averaged to obtain the local mean heightsH n for 23 segments in intervals of about 40 km each. The geographic variation ofH n is approximately explained in terms of the empirical relationship proposed byAbe (1989, 1993). The height prediction from the available earthquake magnitudes ranges from 5.0–8.4 m, which brackets the observed maximum ofH n , 7.7 m, at Okushiri Island.

Key words

Tsunami magnitude runup tsunami warning 


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Copyright information

© Birkhäuser Verlag 1995

Authors and Affiliations

  • Katsuyuki Abe
    • 1
  1. 1.Earthquake Research InstituteThe University of TokyoTokyoJapan

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