Earth, Planets and Space

, Volume 60, Issue 2, pp 133–138 | Cite as

Numerical simulation of the tsunami generated by the 2007 Noto Hanto Earthquake and implications for unusual tidal surges observed in Toyama Bay

  • Ikuo Abe
  • Kazuhisa Goto
  • Fumihiko Imamura
  • Katsuyoshi Shimizu
Open Access


We conducted a numerical analysis of the tsunami generated by the 2007 Noto Hanto Earthquake (Mj = 6.9) that occurred on 25 March 2007 near the Noto Peninsula on the northwest coast of Honshu Island, Japan. Our numerical simulation reproduced well the behaviors of the tsunami as recorded at the Wajima tidal observatory and showed that the computed tsunami arrived in Toyama Bay more than 1 h after the earthquake. However, a crew of a small boat in the bay felt the shock and, despite calm weather conditions, their boat capsized just 3 min after the earthquake. Although abnormal tidal surges were recorded at several locations around Toyama Bay, the timing of these is inconsistent with the surges being a direct result of the tsunami generated at the source area of the earthquake. We used “backward wave propagation analysis” to estimate the likely source area of the abnormal tidal surges in the bay and carried out the a simulation of landslide-induced tsunami. Our conclusion is that these abnormal tidal surges were likely caused by a submarine landslide on the steep sea floor on the western side of Toyama Bay.

Key words

The 2007 Noto Hanto Earthquake tsunami Toyama Bay abnormal wave 


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Copyright information

© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2008

Authors and Affiliations

  • Ikuo Abe
    • 1
  • Kazuhisa Goto
    • 1
  • Fumihiko Imamura
    • 1
  • Katsuyoshi Shimizu
    • 2
  1. 1.Disaster Control Research Center, Graduate School of EngineeringTohoku UniversitySendaiJapan
  2. 2.Marine Information DivisionPort and Airport Research InstituteYokosukaJapan

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