Journal of Seismology

, Volume 12, Issue 2, pp 161–172 | Cite as

Finite-element simulations of long-period ground motions: Japanese subduction-zone earthquakes and the 1906 San Francisco earthquake

  • Yasushi Ikegami
  • Kazuki Koketsu
  • Takeshi Kimura
  • Hiroe Miyake
Original article


Large earthquakes at shallow depths commonly excite long-period ground motions in distant sedimentary basins, thereby inflicting damage upon large-scale structures. For example, the 2003 Tokachi-oki earthquake, Japan, damaged oil tanks in the Yufutsu Basin, located 250 km from the epicenter. Similar long-range effects were also observed during the 2004 earthquake off Kii Peninsula, Japan. In this study, we present the results of simulations of these earthquakes undertaken using the finite element method (FEM) with a voxel mesh. In addition, to examine whether the 1906 San Francisco earthquake excited long-period ground motions in the Los Angeles-area basins, we performed long-period ground motion simulations of most of the California region. The FEM simulations confirmed the importance of path effects for the development of long-period ground motions.


Finite element method Long-period ground motion Los Angeles Basin 1906 San Francisco earthquake 2003 Tokachi-oki earthquake 2004 off Kii Peninsula earthquake 


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Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Yasushi Ikegami
    • 1
    • 2
  • Kazuki Koketsu
    • 1
  • Takeshi Kimura
    • 1
  • Hiroe Miyake
    • 1
  1. 1.Earthquake Research InstituteUniversity of TokyoTokyoJapan
  2. 2.Science and Engineering Systems DivisionITOCHU Techno-Solutions CorporationTokyoJapan

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