Abstract
Models of combined Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) data collected in the region of the Northridge earthquake indicate that significant afterslip on the main fault occurred following the earthquake. Additional shallow deformation occurred to the west of the main rupture plane. Both data sets are consistent with logarithmic time-dependent behavior following the earthquake indicative of afterslip rather than postseismic relaxation. Aftershocks account for only about 10% of the postseismic motion. The two data sets are complimentary in determining the postseismic processes. Fault afterslip and shallow deformation dominate the deformation field in the two years following the earthquake. Lower crustal deformation may play an important role later in the earthquake cycle.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Argus, D.F., Heflin, M.B., Donnellan, A., Webb, F.H., Dong, D., Hurst, K.S., Jefferson, D.C., Lyzenga, G.A., Watkins, M.M., and Zumberge, J.F. (1999), Shortening and Thickening of Metropolitan Los Angeles Measured and Inferred by Using Geodesy, Geology 27, 703-706.
Argus, D.F. and Heflin, M.B. (1995) Plate Motion and Crustal Deformation Estimated with Geodetic Data from the Global Positioning System, Geophys. Res. Lett. 15, 1973-1976.
Donnellan, A. and Lyzenga, G.A. (1998), GPS Observations of Fault Afterslip and Upper CrustalDeformation Following the Northridge Earthquake, J. Geophys. Res. 103, 21,285-21,297.
Donnellan, A., Hager, B.H., King, R.W., and Herring, T.A. (1993), Geodetic Measurement of Deformation in the Ventura Basin Region, Southern California, J. Geophys. Res. 98, 21,727-21,739.
Gabriel, A.G., Goldstein, R.M., and Zebker, H.A. (1989), Mapping Small Elevation Changes OverLarge Areas: Differential Radar Interferometry, J. Geophys. Res. 94, 9183-9191.
Goldstein, R. (1995), Atmospheric Limitations to Repeat-Track Radar Interferometry, Geophys. Res. Lett. 22, 2517-2520.
Hager, B.H., Lyzenga, G.A., Donnellan, A., and Dong, D. (1999), Reconciling Rapid Strain Accumulation with Deep Seismogenic Fault Planes in the Ventura Basin, California, J. Geophys. Res. 104, 25,207-25,219.
Lyzenga, G. A., Panero, W. R. and Donnellan, A. (2000) The Influence of Anelastic Surface Layers on Postseismic Thrust Fault Deformation, J. Geophys. Res. 105, 3151-3157.
Marone, C.J., Sciunz, C.H., and. Bilham, R. (1991), On the Mechanics of Earthquake Afterslip, J. Geophys. Res. 96, 8441-8452.
Massonnet, D., Rossi, M., Carmona, C., Adragna, F., Peltzer, G., GFeigl, K., and Rabaute, T. (1993),The Displacement Field of the Landers Earthquake Mapped by Radar Interferometry, Nature 364, 138-142.
Okada, Y. (1985), Surface deformation due to shear and tensile faults in a half-space, Bull. Seimol, Soc. Am.75, 1135-1154.
Peltzer, G., Rosen, P., Rogez, F., and Hudnut, K. (1996), Postseismic rebound in fault stepovers caused by pore fluid flow, Science 273, 1202-1204.
Peltzer, G., Rosen, P., Rogez, F., and Hudnut, K. (1998), Poroelastic rebound along the Landers 1992 earthquake surface rupture, J. Geophys. Res. 103:30,131-30,145.
Shen, Z., Jackson, D.D., and Ge, B.X. (1996), Crustal deformation across and beyond the Los Angeles basin from geodetic measurements, J. Geophys. Res. 101, 27,957-27,980.
Unruh, J.R., Twiss, R.J., and Hauksson, E. (1997), Kinematics of postseismic relaxation from aftershock focal mechanisms of the 1994 Northridge, California earthquake, J. Geophys. Res. 102, 24,589-24,603.
Wald, D.J., Heaton, T.H., and Hudnut, K.W. (1996), The slip history of the 1994 Northridge, California, earthquake determined from strong-motion, teleseismic, GPS, and leveling data, Bull. Seimol. Soc. Am.86, S49-S70.
Zebker, H.A., Rosen, P.A., and Hensley, S. (1997), Atmospheric effects in interferometric synthetic aperture radar surface deformation and topography maps, J. Geophys. Res. 102, 7547-7563.
Zebker, H. A., Rosen, P., Goldstein, R.M., Gabriel, A., and Werner, C.L. (1994), On the derivation of coseismic displacement fields using differential radar interferometry: The Landers earthquake, J. Geophys. Res. 99, 19,617-19,634.
Zumberge, J.F., Heflin, M.B., Jefferson, D.C., Watkins, M.M., and Webb, F.H. (1997), Precise point positioning for the efficient and robust analysis of GPS data from large networks, J. Geophys. Res. 102, 5005-5017.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2002 Springer Basel AG
About this chapter
Cite this chapter
Donnellan, A., Parker, J.W., Peltzer, G. (2002). Combined GPS and InSAR Models of Postseismic Deformation from the Northridge Earthquake. In: Matsu’ura, M., Mora, P., Donnellan, A., Yin, Xc. (eds) Earthquake Processes: Physical Modelling, Numerical Simulation and Data Analysis Part II. Pageoph Topical Volumes. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-8197-5_6
Download citation
DOI: https://doi.org/10.1007/978-3-0348-8197-5_6
Publisher Name: Birkhäuser, Basel
Print ISBN: 978-3-7643-6916-3
Online ISBN: 978-3-0348-8197-5
eBook Packages: Springer Book Archive