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  1. Article

    Open Access

    Solidified magma reservoir derived from active source seismic experiments in the Aira caldera, southern Kyushu, Japan

    The Aira caldera, located in southern Kyushu, Japan, originally formed 100 ka, and its current shape reflects the more recent 30 ka caldera-forming eruptions (hereafter, called the AT eruptions). This study ai...

    Hiroki Miyamachi, Hiroshi Yakiwara, Reiji Kobayashi in Earth, Planets and Space (2023)

  2. No Access

    Chapter and Conference Paper

    Thrust Force Characteristics of Propulsion Mechanism in Fluid Using Fin with Dynamic Variable-Effective-Length Spring

    We aimed to develop a propulsion mechanism using a variablebending-stiffness fin of which stiffness can be changed dynamically. As the one such variable-stiffness fin, we have developed a fin with a variableef...

    Shunichi Kobayashi, Masataka Nakabayashi in Bio-mechanisms of Swimming and Flying (2008)

  3. Article

    Open Access

    Source processes of the 2005 West Off Fukuoka Prefecture earthquake and its largest aftershock inferred from strong motion and 1-Hz GPS data

    We simultaneously inverted strong motion and 1-Hz GPS data recorded during the 2005 west off Fukuoka prefecture earthquake (MJMA 7.0) for its source process. The data at a GPS station near the source region provi...

    Reiji Kobayashi, Shin’ichi Miyazaki, Kazuki Koketsu in Earth, Planets and Space (2006)

  4. Article

    Open Access

    Source process of the 1923 Kanto earthquake inferred from historical geodetic, teleseismic, and strong motion data

    The historical geodetic and teleseismic data are jointly inverted for the rupture process of the 1923 Kanto earthquake together with the strong motion data recently discovered. The resultant slip distribution ...

    Reiji Kobayashi, Kazuki Koketsu in Earth, Planets and Space (2005)

  5. Article

    Polarization anomalies of Love waves observed in and around Japan

    Polarization anomalies of Love waves, sometimes called quasi-Love waves, are likely to be caused by lateral variations of azimuthal anisotropy in the upper mantle. Polarization anomalies of Love waves from the...

    Reiji Kobayashi in Earth, Planets and Space (2002)