1. JMA (1996), “Seismic Intensity”(in Japanese), Gyosei.
2. Kamigaichi, O., K.Ohtake, D.Nozaka, D.Hasebe, T.Odaka, S.Tsukada, K.Ashiya & S.Sato (2002), “Focal parameters estimation method to be used in JMA nowcast earthquake information - 2 - Magnitude estimation.”, Proceedings of 2002 Japan Earth Planetary Science Joint Meeting, S045-P007.
3. Matsuoka, M.& S.Midorikawa (1994), “The Digital National Land Information and Seismic Microzoning”(in Japanese), Proceeding of the 22nd Symposium of Earthquake Ground Motion., AIJ, 23-34
4. Midorikawa, S., K.Fujimoto & I.Muramatsu (1999), “Correlation of New J.M.A. Instrumental Seismic Intensity with Former J.M.A. Seismic Intensity and Ground Motion Parameters.”(in Japanese), Journal of Institute of Social Safety Science, 51-56
5. Odaka, T., K.Ashiya, S.Tsukada, S.Sato, K.Ohtake & D.Nozaka (2003), “A New Method of Quickly Estimating Epicentral Distance and Magnitude from a Single Seismic Record.”, BSSA, vol.93, 526-532.