- Open Access
Resolving static offsets from high-rate GPS data: the 2003 Tokachi-oki earthquake
Earth, Planets and Space volume 60, pages801–808(2008)
The Mw 8.0 2003 Tokachi-oki earthquake offshore Hokkaido is the largest earthquake observed to date by a dense GPS network (GEONET). These GPS data are important both for resolving the geodetic signature of the earthquake itself and studies of postseismic deformation. Because GPS positions are generally estimated by averaging 24 hours of observations, it can be difficult to separate the effects of the earthquake and early postseismic deformation. In order to address this difficulty, a Kalman filtering methodology is developed that allows the estimation of the static offsets for the mainshock, its largest aftershock, and postseismic deformation in the first 24 hours. The static offsets computed for this study can be used for earthquake rupture studies while the early postseismic data can be used to evaluate frictional properties of the fault.
Altamimi, Z., P. Sillard, and C. Boucher, ITRF2000: A new release of the International Terrestrial Reference Frame for earth science applications, J. Geophys. Res., 107(B10), 2214, doi:10.1029/2001JB000561, 2002.
Blewitt, G., Carrier phase ambiguity resolution for the Global Positioning System applied to geodetic baselines up to 2000 km, J. Geophys. Res., 94(B8), 10187–10203, doi:10.1029/89JB00484, 1989.
Choi, K., Improvements in GPS Precision: 10-Hz to One Day, Doctoral Dissertation, University of Colorado, 2007.
Geographical Survey Institute of Japan, Report for the 154-th Coord. Comm. Earthquake Prediction, 2003.
Hatanaka, Y., M. Sawada, A. Horita, and M. Kusaka, Calibration of antenna-radome and monument-multipath effect of GEONET—Part 1: Measurement of phase characteristics, Earth Planets Space, 53, 13–21, 2001.
Johnson, K., R. Burgmann, and K. Larson, Frictional afterslip following the 2004 Parkfield, California earthquake, BSSA, 96(4b), S321, DOI: 10.1785/gssrl.77.4.491, 2006.
Koketsu, K., K. Hikima, S. Miyazaki, and S. Ide, Joint inversion of strong motion and geodetic data for the source process of the 2003 Tokachi-oki, Hokkaido, earthquake, Earth Planets Space, 56, 329–334, 2004.
Langbein, J. et al., Preliminary report on the 28 September 2004, M6.0 Parkfield, California, earthquake, Seismol. Res. Lett., 76, 1–17, 2005.
Larson, K., P. Cervelli, M. Lisowski, A. Miklius, P. Segall, and S. Owen, Volcano Monitoring using GPS I. Filtering Strategies, J. Geophys. Res., 106, 19,453–19,464, doi:10.1029/2001JB000305, 2001.
Larson, K., P. Bodin, and J. Gomberg, Using 1 Hz GPS Data to Measure Deformations Caused by the Denali Fault Earthquake, Science, 300, 1421–1424, doi: 10.1126/science.1084531, 2003.
Larson, K., A. Bilich, and P. Axelrad, Improving the precision of highrate GPS, J. Geophys. Res., 112, B05422, doi:10.1029/2006JB004367, 2007.
Lichten, S. and J. Borders, Strategies for High-precision Global Positioning System Orbit Determination, J. Geophys. Res., 92, 12,751–12,762, 1987.
Miura, S., Y. Suwa, A. Hasegawa, and T. Nishimura, The 2003 M8.0 Tokachi-Oki earthquake: How much has the great event paid back slip debts?, Geophys. Res. Lett., 31, L05613, doi:10.1029/2003GL019021, 2004.
Miyazaki, S. and K. Larson, Coseismic and early postseismic slip for the 2003 Tokachi-oki earthquake sequence inferred from GPS data, Geophys. Res. Lett., 35, L04302, doi:10.1029/2007GL032309, 2008.
Miyazaki, S., T. Saito, M. Sasaki, Y. Hatanaka, and Y. Iimura, Expansion of GSI’s nationwide GPS array, Bull. Geogr. Surv. Inst., 43, 23–24, 1997.
Miyazaki, S., T. Iwabuchi, K. Heki, and I. Naito, An impact of estimating tropospheric delay gradients on precise positioning in the summer using the Japanese nationwide GPS array, J. Geophys. Res., 108(B7), 2335, doi:10.1029/2000JB000113, 2003.
Miyazaki, S., P. Segall, J. Fukuda, and T. Kato, Space time distribution of afterslip following the 2003 Tokachi-oki earthquake: Implications for variations in fault zone frictional properties, Geophys. Res. Lett., 31, L06623, doi:10.1029/2003GL019410, 2004a.
Miyazaki, S., K. Larson, K. Choi, K. Hikima, K. Koketsu, P. Bodin, J. Haase, G. Emore, and A. Yamagiwa, Modeling the rupture process of the 2003 Tokachi-Oki earthquake using 1-Hz GPS data, Geophys. Res. Lett., 31(21), L21603, doi:10.1029/2004GL021457, 2004b.
Niell, A. E., Global mapping functions for the atmosphere delay at radio wavelengths, J. Geophys. Res., 101(B2), 3227–3246, doi:10. 1029/95JB03048, 1996.
Ozawa, S., M. Kaidzu, M. Murakami, T. Imakiire, and Y. Hatanaka, Co-seismic and postseismic crustal deformation after the Mw 8 Tokachi-oki earthquake in Japan, Earth Planets Space, 56, 675–680, 2004.
Segall, P. and M. Matthews, Time dependent inversion of geodetic data, J. Geophys. Res., 102, 391–409, 1997.
Wald, D. and R. Graves, Resolution analysis of finite fault source inversion using one- and three-dimensional Green’s functions 2.: combining seismic and geodetic data, J. Geophys. Res., 106(B5), 8767–8788, 2001.
Yamanaka, Y. and M. Kikuchi, Source processes of the recurrent Tokachi-oki earthquake on September 26, 2003, inferred from teleseismic body waves, Earth Planets Space, 55, e21–e24, 2003.
About this article
Cite this article
Larson, K.M., Miyazaki, S. Resolving static offsets from high-rate GPS data: the 2003 Tokachi-oki earthquake. Earth Planet Sp 60, 801–808 (2008) doi:10.1186/BF03352831
- great earthquake
- geodetic data
- static offset
- postseismic deformation