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Effect of complex fault geometry and slip style on near-fault strong motions and static displacement
Earth, Planets and Space volume 55, pages 515–530 (2003)
Although there are many studies that deal with complex slip distribution or rupture propagation on an earthquake fault, they usually regard a fault system as a fault of simple geometry. Actual fault systems have highly heterogeneous slip distribution and very complicated shapes, as is often observed through field surveys of surface breaks. In this study, we synthesize seismograms including static displacement near a fault using the discrete wavenumber method in order to estimate the effects of the above types of fault complexity in a quantitative manner. We introduce a complex slip distribution based on the Nojima Fault associated with the 1995 Hyogo-ken Nanbu earthquake. As a result, we show that strong motions at a frequency of lower than 1.0 Hz are strongly affected by the complexity of the fault geometry, at a scale of not more than several km, rather than the rupture propagation style. Distributions of static displacement fluctuate, depending on the fault geometry characterized by the length of each fault segment. Such small-scale variations in fault geometry (≤1 km) have been mostly ignored prior to this work. Our results also suggest that details of fault segmentation and bending can be determined by dense observations (e.g., GPS or geological surveys) of static displacement near a fault system, indicating the importance of simultaneous studies on static and dynamic near-fault motions.
Aki, K. and P. G. Richards, Quantitative Seismology: Theory and Methods, W. H. Freeman and Co., San Francisco, 1980.
Aochi, H. and E. Fukuyama, Three-dimensional nonplanar simulation of the 1992 Landers earthquake, J. Geophys. Res., 102, 10.1029/2000JB000061, 2002.
Aochi, H., R. Madariaga, and E. Fukuyama, Effect of normal stress during rupture propagation along nonplanar faults, J. Geophys. Res., 107, 10.1029/2001JB000500, 2002.
Archuleta, R. and S. Hartzell, Effects of fault finiteness on near-source ground motion, Bull. Seis. Soc. Am., 71, 939–957, 1981.
Bernard, P., A. Herrero, and C. Berge, Modeling directivity of heterogeneous earthquake ruptures, Bull. Seis. Soc. Am., 86, 1149–1160, 1996.
Beroza, G. and T. Mikumo, Short slip duration in dynamic rupture in the presence of heterogeneous fault properties, J. Geophys. Res., 101, 22,449–22,460, 1996.
Bouchon, M., A dynamic source model for the San Fernando earthquake, Bull. Seis. Soc. Am., 68, 1555–1576, 1978.
Bouchon, M. and K. Aki, Discrete wave-number representation of seismic-source wave fields, Bull. Seis. Soc. Am., 67, 259–277, 1977.
Chin, B. H., Simultaneous Study of the Source, Path and Site Effects on Strong Ground Motion during the 1989 Loma Prieta Earthquake, Ph.D. thesis, University of Southern California, 1992.
Cotton, F. and O. Coutant, Dynamic stress variations due to shear faults in a plane-layered medium, Geophys. J. Int., 128, 676–688, 1997.
Fukuyama, E. and R. Madariaga, Rupture dynamics of a planar fault in a 3D elastic medium: Rate- and slip-weakening friction, Bull. Seis. Soc. Am., 88, 1–17, 1998.
Furumura, T. and K. Koketsu, Specific distribution of ground motion during the 1995 Kobe earthquake and its generation mechanism, Geophys. Res. Lett., 25, 785–788, 1998.
Harris, R. and S. Day, Dynamics of fault interaction: Parallel strike-slip faults, J. Geophys. Res., 98, 4461–4472, 1993.
Harris, R. and S. Day, Dynamic 3-D simulations of earthquakes on en echelon faults, Geophys. Res. Lett., 26, 2089–2092, 1999.
Hartzell, S. H. and T. H. Heaton, Rupture history of the 1984 Morgan Hill, California, earthquake from the inversion of strong-motion data records, Bull. Seis. Soc. Am., 76, 649–674, 1986.
Hayashi, H., Fractal analysis of the fault system and stress drop of aftershocks for Hyogoken-nambu earthquake, Senior Thesis, Hiroshima University, 1996.
Herrero, A. and P. Bernard, A kinematic self-similar rupture process for earthquakes, Bull. Seis. Soc. Am., 84, 1216–1228, 1994.
Hisada, Y., A theoretical omega-square model considering the spatial variation in slip and rupture velocity, Bull. Seis. Soc. Am., 90, 387–400, 2000.
Honda, R. and K. Yomogida, Contribution of vertically traveling plane S-waves to dynamic and static displacements near a finite fault, Geophys. J. Int., 152, 443–454, 2003a.
Honda, R. and K. Yomogida, Static and dynamic displacement near a fault with the discrete wavenumber method, Phys. Earth Planet. Inter., 137, 107–127, 2003b.
Inoue, T. and T. Miyatake, 3-D simulation of near-field strong motion: Basin edge effect derived from rupture directivity, Geophys. Res. Lett., 24, 905–908, 1997.
Inoue, T. and T. Miyatake, 3D simulation of near-field strong ground motion based on dynamic modeling, Bull. Seis. Soc. Am., 88, 1445–1456, 1998.
Kakehi, Y. and K. Irikura, Estimation of high-frequency wave radiation areas on the fault plane by the envelope inversion of acceleration seismograms, Geophys. J. Int., 125, 892–900, 1996.
Kase, Y. and K. Kuge, Rupture propagation beyond fault discontinuities: Significance of fault strike and location, Geophys. J. Int., 147, 330–342, 2001.
Kawase, H., Strong motion evaluation in the near-fault region considering the slip-velocity function of the source, in Confronting Urban Earthquakes, edited by K. Toki, pp. 410–413, 2000.
Li, Y., K. Aki, D. Adams, and A. Hasemi, Seismic guided waves trapped in the fault zone of the Landers, California, earthquake of 1992, J. Geophys. Res., 99, 11,705–11,722, 1994.
Matsumoto, N., K. Yomogida, and S. Honda, Fractal analysis of fault systems in Japan and the Philippines, Geophys. Res. Lett., 19, 357–360, 1992.
Michel, R. and J.-P. Avouac, Deformation due to the 17 August 1999 Izumit, Turkey, earthquake measured from SPOT images, J. Geophys. Res., 107, 10.1029/200JB000102, 2002.
Miyatake, T., Computer simulation of strong ground motion near a fault using dynamic fault rupture modeling: Spatial distribution of the peak ground velocity vectors, Pure Appl. Geophys., 157, 2063–2081, 2000.
Nakata, T. and K. Yomogida, Surface fault characteristics of the 1995 Hyogoken-nambu earthquake, J. Natural Disas. Sci., 16, 1–9, 1995.
Nakata, T., H. Tsutsumi, R. S. Punongbayan, R. E. Rimando, J. Daligdig, and A. Daag, Surface faulting associated with the Philippine earthquake of 1990, Journal of Geography, 99, 95–112, 1990.
Oglesby, D., R. J. Archuleta, and S. Nielsen, The three-dimensional dynamics of dipping fault, Bull. Seism. Sci. Am., 90, 616–628, 2000.
Okubo, P. G. and K. Aki, Fractal geometry in the San Andreas fault system, J. Geophys. Res., 92, 345–355, 1987.
Ruppert, S. D. and K. Yomogida, A crack-like rupture model for the 19 September 1985 Michoacan, Mexico, earthquake, PAGEOPH, 138, 407–427, 1992.
Sekiguchi, H., K. Irikura, T. Iwata, Y. Kakehi, and M. Hoshiba, Minute locating of faulting beneath Kobe and the waveform inversion of the source process during the 1995 Hyogo-ken Nanbu, Japan, earthquake using strong ground motion records, J. Phys. Earth, 44, 473–487, 1996.
Sekiguchi, H., K. Irikura, and T. Iwata, Fault geometry at the rupture termination of the 1995 Hyogo-ken Nanbu earthquake, Bull. Seis. Soc. Am., 90, 117–133, 2000.
Wald, D. J. and T. Heaton, Spatial and temporal distribution of slip for the 1992 Landers, California, earthquake, Bull. Seis. Soc. Am., 84, 668–691, 1994.
Wald, D. J., T. Heaton, and K. Hudnut, The slip history of the 1994 Northridge, California, earthquake determined from strong-motion, teleseismic, GPS, and leveling data, Bull. Seis. Soc. Am., 86, S49–S70, 1996.
Yeats, R. S., K. Sieh, and C. R. Allen, The Geology of Earthquakes, Oxford University Press, New York, 1997.
Yomogida, K., Crack-like rupture processes observed in near-fault strong motion data, Geophys. Res. Lett., 15, 1223–1226, 1988.
Yoshida, S., K. Koketsu, B. Shibazaki, T. Sagiya, T. Kato, and Y. Yoshida, Joint inversion of near- and far-field waveforms and geodetic data for the rupture process of the 1995 Kobe earthquake, J. Phys. Earth, 44, 437–454, 1996.
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Honda, R., Yomogida, K. Effect of complex fault geometry and slip style on near-fault strong motions and static displacement. Earth Planet Sp 55, 515–530 (2003). https://doi.org/10.1186/BF03351785
- Near field
- strong motion
- fault geometry
- kinematic model