日本海沿岸に発生する地震に伴う津波の波源と伝播 : 1704年岩館地震,1793年鯵ヶ沢地震,および1804年象潟地震による津波  [in Japanese] Source Area and Propagation of Tsunami Generated by Earthquakes along the Northeastern Japan Sea Coast : Tsunami of the 1704 Iwadate, the 1793 Ajigasawa, and the 1804 Kisakata Earthquakes  [in Japanese]

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Author(s)

    • 樋渡 康子 HIWATASHI Yasuko
    • 弘前大学理学部地球科学科 Present address : Department of Engineering, Graduate School of Engineering, Tohoku University
    • 佐藤 魂夫 SATO Tamao
    • 弘前大学理工学部地球環境学科 Department of Earth and Environmental Sciences, Faculty of Science and Technology, Hirosaki University
    • 今村 文彦 IMAMURA Fumihiko
    • 東北大学大学院工学研究科付属災害制御研究センター Disaster Control Research Center, Graduate School of Engineering, Tohoku University

Abstract

Three earthquakes and accompanying tsunamis of 1704, 1793 and 1804 hit the coastal area of the Aomori-Akita districts in the northern part of Japan Sea, causing several hundreds of fatalities and serious damages to houses and ships. In this study, we simulate the generation and the propagation of these tsunamis by assuming several fault models, and determine a set of fault parameters for each earthquake that best fits the observed distributions of tsunami heights and crustal uplifts. The fault model previously proposed by Sato (1980) for the 1704 Iwadate earthquake generally explains the observed tsunami heights, but a similar model with the fault length 3km longer towards the north is more consistent with the reported crustal uplift at Henashi peninsula. For the 1793 Ajigasawa earthquake, a fault model lying off the coast of Tsugaru peninsula better explains the observed tsunami heights around Ajigasawa. The tsunami simulation also corroborates the observation that tsunami caused by the event might flush into the Jyusan Lake. Among several fault models tested for the 1804 Kisakata earthquake, a fault model located most offshore shows the best agreement with the observed distribution of tsunami heights. The tsunami simulations for the 1704 Iwadate and 1804 Kisakata earthquakes show that the tsunamis are largely amplified at Oga peninsula. The amplification is ascribed to an energy concentration by the reflection in the 1704 Iwadate tsunami and the edge wave trapped in the shallow sea in the 1804 Kisakata tsunami, respectively. Both are important mechanisms affecting the heights of tsunamis along the Japan Sea coast.

Journal

  • Zisin (Journal of the Seismological Society of Japan. 2nd ser.)

    Zisin (Journal of the Seismological Society of Japan. 2nd ser.) 54(4), 431-440, 2002-04-01

    SEISMOLOGICAL SOCIETY OF JAPAN

References:  15

Cited by:  2

Codes

  • NII Article ID (NAID)
    10008205068
  • NII NACSIS-CAT ID (NCID)
    AN00305741
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00371114
  • NDL Article ID
    6561767
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-199
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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