THE SOUTHERN CALIFORNIA INTEGRATED GPS NETWORK (SCIGN)

This paper describes the fundamental scientific and observational goals of the Southern California Integrated GPS Network (SCIGN). It also reviews the organizational structure, the project management, and important policies. Recent accomplishments are also discussed in some detail, in particular the effective response following the October 16, 1999 Hector Mine earthquake (Mw7.1). The scientific motivation for establishing a continuous GPS network to observe time transient crustal deformation is discussed in detail, especially as it pertains to the 1990’s sequence of fault interaction and postseismic deformation in the eastern California shear zone. As of March 2001, a total of 239 SCIGN stations are operating; 170 of the newest stations were installed by a contractor. The third phase of network construction was recently completed at an average rate of 2 new stations per week. Network implementation is continuing, and construction of the final 16 stations will be fully completed by July 1, 2001.

[1]  Jerome A. Treiman,et al.  Near-Field Investigations of the Landers Earthquake Sequence, April to July 1992 , 1993, Science.

[2]  K. Mogi.  Global variation of seismic activity , 1979 .

[3]  Kenneth W. Hudnut,et al.  Analysis of coseismic surface displacement gradients using radar interferometryc New insights into the Landers earthquake , 1994 .

[4]  Kiyoo Mogi,et al.  Active periods in the world's chief seismic belts , 1974 .

[5]  Kenneth W. Hudnut,et al.  Southern California Permanent GPS Geodetic Array: Continuous measurements of regional crustal deformation between the 1992 Landers and 1994 Northridge earthquakes , 1997 .

[6]  A. Nur,et al.  The Nature of the Landers-Mojave Earthquake Line , 1993, Science.

[7]  J. C. Savage,et al.  An apparent shear zone trending north-northwest across the Mojave Desert into Owens Valley, eastern , 1990 .

[8]  Kenneth W. Hudnut,et al.  Preliminary Report on the 16 October 1999 M 7.1 Hector Mine, California, Earthquake , 2000 .

[9]  J. C. Savage.  A Theory of Creep Waves propagating along a transform fault , 1971 .

[10]  C. R. Allen,et al.  Patterns of seismic release in the southern California region , 1995 .

[11]  Sean C. Solomon,et al.  Geodetic slip rate for the eastern California shear zone and the recurrence time of Mojave desert earthquakes , 1994, Nature.

[12]  Mehmet Çelebi,et al.  GPS Monitoring of Dynamic Behavior of Long-Period Structures , 1999 .

[13]  Kenneth W. Hudnut,et al.  Monitoring Structural Deformation at Pacoima Dam, California Using Continuous GPS , 1998 .

[14]  R. E. Wallace.  Grouping and migration of surface faulting and variations in slip rates on faults in the Great Basin province , 1987 .

[15]  Kiyoo Mogi,et al.  4. Migration of Seismic Activity , 1968 .

[16]  Kenneth W. Hudnut,et al.  Poroelastic rebound along the Landers 1992 earthquake surface rupture , 1998 .

[17]  D. L. Anderson.  Earthquakes and the Rotation of the Earth , 1974, Science.

[18]  J. Stock,et al.  Pacific-North America Plate Tectonics of the Neogene Southwestern United States: An Update , 1998 .

[19]  James H. Dieterich,et al.  Progressive failure on the North Anatolian fault since 1939 by earthquake stress triggering , 1997 .

[20]  Paul Rosen,et al.  Postseismic Rebound in Fault Step-Overs Caused by Pore Fluid Flow , 1996, Science.

[21]  James L. Davis,et al.  GPS APPLICATIONS FOR GEODYNAMICS AND EARTHQUAKE STUDIES , 1997 .

[22]  James C. Savage,et al.  Postseismic deformation associated with the 1992 M ω=7.3 Landers earthquake, southern California , 1997 .

[23]  Fred F. Pollitz,et al.  Gravitational viscoelastic postseismic relaxation on a layered spherical Earth , 1997 .

[24]  R. E. Wallace.  Patterns and timing of Late Quaternary faulting in the Great Basin Province and relation to some regional tectonic features , 1984 .

[25]  M. Bott,et al.  Stress Diffusion from Plate Boundaries , 1973, Nature.

[26]  G. King,et al.  STATIC STRESS CHANGES AND THE TRIGGERING OF EARTHQUAKES , 1994 .

[27]  K. Mogi.  Sequential Occurrences of Recent Great Earthquakes , 1968 .

[28]  James L. Davis,et al.  Continuous GPS measurements of contemporary deformation across the Northern Basin and Range Province , 1998 .

[29]  K. Hudnut,et al.  Continuous GPS Monitoring of Structural Deformation at Pacoima Dam, California , 1998 .

[30]  B. Wernicke,et al.  Cenozoic Tectonism in the Central Basin and Range: Motion of the Sierran-Great Valley Block , 1998 .