The University of Tokyo Symposium on Long-Period Ground Motion and Urban Disaster Mitigation

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March 17-18, 2010
Fukutake Hall
Interfaculty Initiative in Information Studies, University of Tokyo, Japan

(venue, access)

Hosted by Organizers of the University of Tokyo Symposium on Long-Period Ground Motion and Urban Disaster Mitigation
Supported by SCEC-ERI Cooperation Program and Grant-in-Aid for Scientific Research (No.19201034)



    Long-period ground motion has become an important consideration in disaster mitigation because of the recent rapid increase in the number of large-scale structures, such as high-rise buildings, big oil storage tanks, and long-span bridges. Large subduction-zone earthquakes and moderate to large crustal earthquakes can generate long-period ground motions with long duration in distant sedimentary basins with the help of path effects. The worst example of destruction caused by long-period ground motion occurred in Mexico City 400km away from the 1985 Michoacan earthquake. Recent examples are fires in oil storage tanks caused by the 2003 Tokachi-oki earthquake that occurred in Hokkaido, Japan. Since megathrust earthquakes such as those in the Tokai, Tonankai, and Nankai regions are expected to occur in near future, long-period ground motion is a threat to be considered seriously by Japan where large cities are located along a subduction zone.
    Long-period ground motion and its urban disasters are also global issues beyond Japan. Large earthquakes, which often generate damaging long-period ground motions, occur in various regions in the world, and long-period ground motion traveling for a long distance is essentially a phenomenon over country boundaries. Countermeasures against long-period ground motion begin to be implemented into seismic design codes in many countries. We have to reconstruct research on long-period ground motion, based on rapid progress in ground motion prediction and simulation using huge data from strong motion observation networks strengthened recently. In addition, the recent increase of large-scale structures has greatly changed the situation of urban areas. Therefore, it is now necessary to comprehensively research long-period ground motion and urban disaster mitigation.

Invited Speakers and Panelists (in alphabetical order)

  • Kazuki Koketsu (ERI, Univ. Tokyo) (Chair)
  • Muneo Hori (ERI, Univ. Tokyo)
  • Toshimi Kabeyasawa (ERI, Univ. Tokyo)
  • Tsuyoshi Takada (Graduate School of Engineering, Univ. Tokyo)
  • Yoshiaki Nakano (IIS, Univ. Tokyo)
  • Teruyuki Kato (ERI, Univ. Tokyo)
  • Robert Geller (Graduate School of Science, Univ. Tokyo)
  • Takashi Furumura (III/ERI, Univ. Tokyo)
Local Organizing Committee
  • Hiroe Miyake (ERI, Univ. Tokyo)(Secretary)
  • Tsuyoshi Ichimura (ERI, Univ. Tokyo)
  • Yousok Kim (ERI, Univ. Tokyo)
  • Tatsuya Itoi (Graduate School of Engieering, Univ. Tokyo)
  • Noriyuki Takahashi (IIS, Univ. Tokyo)
  • Tokie Watanabe (ERI, Univ. Tokyo)
  • Kazuki Koketsu (ERI, Univ. Tokyo)

The symposium is an FY 2009 event of the International Scientific Symposia Program of the University of Tokyo.
This page is located at <>.

May 30, 2009
Jul. 12, 2010