- Open Access
Transient crustal deformation in Tokai region, central Japan, until May 2004
Earth, Planets and Space volume 57, pages909–915(2005)
An analysis of Global Positioning System (GPS) data reveals a continuation of the transient crustal deformation that was first reported by Ozawa et al. (2002) in the western Tokai region. Kalman filtering following the time-dependent inversion shows a slow-thrust slip occurring on the plate boundary in the western Tokai region, with its center around Lake Hamana, which is adjacent to the anticipated Tokai earthquake source area. The moment release from the Tokai silent earthquake was observed to be continuous surpassing Mw 7.0 in May 2004, with relative slip increases to the northeast and north of Lake Hamana from 2002. The moment release rate decreased in 2002, and then increased in 2003, reaching the rate observed in 2001.
Akaike, H., A new look at the statistical model identification, IEEE, Trans. Auto. Control, AC-19, 716–723, 1974.
Ando, M., Source mechanism and tectonic significance of historical earthquakes along the Nankai trough, Japan, Tectonophysics, 27, 119–140, 1975.
Bierman, G. J., Factorization Methods for Discrete Sequential Estimation, Academic Press, New York, 1977.
El-Fiky, G. and T. Kato, Study of periodic vertical movement in the Omaezaki peninsula, central Japan, and its tectonic implications, Earth Planets Space, 52, 25–35, 2000.
Hashimoto, M., Abnormal strain change in the Tokai region in the 1980’s, Chikyu Monthly, 41, 20–26, 2003.
Hatanaka, Y. et al., Improvement of the analysis strategy of GEONET, Bull. Geograph. Survey Inst., 49, 11–37, 2003.
Hirose, H. and K. Obara, Repeating slow slip events which correlated deep low-frequency tremor activity in southwest Japan, Fall Meeting of Seismological Society of Japan, 2003.
Hirose, H., K. Hirahara, F. Kimata, N. Fujii, and S. Miyazaki, A slow thrust slip event following the 1996 Hyuga-nada earthquakes beneath the Bungo Channel, southwest Japan, Geophys. Res. Lett, 26, 3237–3240, 1999.
Hirose, I., I. Kawasaki, Y. Okada, T. Sagiya, and Y. Tamura, A silent earthquake of December 9, 1989, in the Tokyo Bay, as revealed by the continuous observation of crustal movements in the southern Kanto district, central Japan, J. Seismol. Soc. Jpn., 53, 11–23, 2000 (in Japanese with English abstract).
Hugentobler, U., S. S. Shaer, and P. Fridez (eds.), The BERNESE GPS software Version 4.2, Astronomical Institute, University of Berne, 515 pp., 2001.
Inouchi, N. and H. Sato, Vertical crustal deformation accompanied with the Tonankai Earthquake of 1944, Bull. Geogr. Survey Inst. Japan, 21, 10–18, 1975.
Ishibashi, K., Identification of a soon-to-occur seismic faulting in the Tokai district, central Japan, based upon seismotectonics, in Earthquake Prediction, Maurice Ewing Series, IV, pp. 297–332, AGU, Washington D.C., 1981.
Ishida, M., Geometry and relative motion of the Philippine sea plate and Pacific plate beneath the Kanto-Tokai district, Japan, J. Geophys. Res., 97, 489–513, 1992.
Ishigaki et al., Synchronization between aseismic slip in the Tokai district and low-frequency earthquakes, Spring meeting of the Seismological Society of Japan, 2004.
Kimata, F., K. Hirahara, and N. Fujii, Repeated slow slip events and the occurrence process of the large earthquakes in the Tokai region, central Japan, 2003 IUGG Meeting, JSS01/30A/D-040, 2003.
Matsumura, S., Focal zone of a future Tokai earthquake inferred from the seismicity pattern around the plate interface, Tectonophysics, 273, 271–291, 1997.
McGuire J. J. and P. Segall, Imaging of aseismic fault slip transients recorded by dense geodetic networks, Geophy J. Int., 155, 778–788, 2003.
Mogi, K., Earthquake prediction program in Japan, in Earthquake Prediction, An International Review, Maurice Ewing Series, IV, pp. 635–666, AGU, Washington D.C., 1981.
Nishimura, T. et al., Crustal deformation caused by magma migration in the northern Izu Islands, Japan, Geophy. Res. Lett., 28, 3745–3748, 2001.
Obara, K., Nonvolcanic deep tremor associated with subduction in southwest Japan, Science, 296, 1679–1681, 2002.
Obara, K. and H. Hirose, Periodic activity of deep low-frequency earthquakes and correlated tilt changes observed in southwest Japan subduction zone, Fall Meeting of Seismological Society of Japan, 2003.
Obara, K. and H. Hirose, Deep low-frequency tremors and slow slip events, Rep. Coord, Commit, Eq. Pred., 72, 575–581, 2004.
Okada, Y., Surface deformation due to shear and tensile faults in half-space, Bull. Seism. Soc. Am., 75, 1135–1154, 1985.
Ozawa, S., M. Murakami, and T. Tada, Time-dependent inversion analysis of the slow thrust event in the Nankai trough subduction zone, southwestern Japan, J. Geophys. Res., 106, 787–802, 2001.
Ozawa, et al., Detection and Monitoring of ongoing aseismic slip in the Tokai region, central Japan, Science, 298, 1009–1012, 2002.
Rogers, G. and H. Dragert, Episodic tremor and slip on the Cascadia subduction zone: the chatter of silent slip, Science, 300, 1942–1943, 2003.
Sagiya, T., Interplate coupling in the Tokai district, central Japan, deduced from continuous GPS data, Geophys. Res. Lett., 26, 2315–2318, 1999.
Sagiya, T., Interplate coupling in the Kanto District, central Japan, and the Boso Silent earthquake in May 1996, PAGEOPH, 2004 (in press).
Segall, P. and M. Matthews, Time-dependent inversion of geodetic data, J. Geophys. Res., 102, 22391–22409, 1997.
Simon, D. and D. L. Simon, Aircraft turbofan engine health estimation using constrained Kalman filtering, ASME Turbo Expo 2003, Atlanta, GA, paper GT2003-38584, 2003.
Yoshioka, et al., Interplate coupling and relative plate motion in the Tokai district, central Japan, deduced from geodetic inversion using ABIC, Geophys. J. Int., 113, 607–621, 1993.
About this article
Cite this article
Ozawa, S., Murakami, M., Kaidzu, M. et al. Transient crustal deformation in Tokai region, central Japan, until May 2004. Earth Planet Sp 57, 909–915 (2005) doi:10.1186/BF03351870
- transient crustal deformation
- aseismic slip