Instantaneous global plate motion model from 12 years of continuous GPS observations

[1] We estimate a global plate motion model for 17 major and minor tectonic plates solely on the basis of analysis of data from 106 globally distributed continuous GPS stations, spanning the period from January 1991 to July 2003. Site positions estimated from 24-hour segments of data are aligned day-by-day to the International GPS Service (IGS) realization of the ITRF2000 reference frame using a similarity transformation, thereby ensuring that the ITRF2000 no-net-rotation condition is preserved. Linear velocities of a carefully selected set of stations are estimated from the position time series, along with annual and semiannual fluctuations and position offsets due to GPS instrument changes. A white noise plus flicker noise model is applied to estimate realistic uncertainties for the site velocities, which are then propagated into the derived plate motion model parameters. We also examine the vertical velocities in the site selection process. At the Scripps Orbit and Permanent Array Center we have implemented a procedure whereby the plate motion model is updated on a regular (monthly) basis to improve its precision and reliability as new data become available and as a baseline against which anomalous motions can be detected.

[1]  S. Williams.  The effect of coloured noise on the uncertainties of rates estimated from geodetic time series , 2003 .

[2]  Timothy Ian Melbourne,et al.  Rapid postseismic transients in subduction zones from continuous GPS , 2002 .

[3]  S. Stein,et al.  Can the Okhotsk Plate be discriminated from the North American plate , 1996 .

[4]  Richard G. Gordon,et al.  No-net-rotation model of current plate velocities incorporating plate motion model NUVEL-1 , 1991 .

[5]  Tim Melbourne,et al.  Periodic Slow Earthquakes from the Cascadia Subduction Zone , 2002, Science.

[6]  A. John Haines,et al.  An integrated global model of present‐day plate motions and plate boundary deformation , 2003 .

[7]  Yehuda Bock,et al.  Guadalupe Island, Mexico as a new constraint for Pacific plate motion , 2003 .

[8]  W. J. Morgan,et al.  Rises, trenches, great faults, and crustal blocks , 1968 .

[9]  D. Jongmans,et al.  Active faulting and paleoseismology along the Bree fault, lower Rhine graben, Belgium , 2000 .

[10]  Michael B. Heflin,et al.  Absolute far-field displacements from the 28 June 1992 Landers earthquake sequence , 1993, Nature.

[11]  W. J. Morgan,et al.  Convection Plumes in the Lower Mantle , 1971, Nature.

[12]  Geoffrey Blewitt,et al.  Effect of annual signals on geodetic velocity , 2002 .

[13]  Kenneth W. Hudnut,et al.  Detection of crustal deformation from the Landers earthquake sequence using continuous geodetic measurements , 1993, Nature.

[14]  R. Nikolaidis.  Observation of geodetic and seismic deformation with the Global Positioning System , 2002 .

[15]  Yehuda Bock,et al.  Detection of arbitrarily large dynamic ground motions with a dense high‐rate GPS network , 2004 .

[16]  Takeshi Sagiya,et al.  The nationwide GPS array as an earth observation system , 1998 .

[17]  Y. Bock,et al.  Geodetic detection of active faults in S. California , 2001 .

[18]  Yehuda Bock,et al.  Seismic wave observations with the Global Positioning System , 2001 .

[19]  Kelin Wang,et al.  A Silent Slip Event on the Deeper Cascadia Subduction Interface , 2001, Science.

[20]  Yehuda Bock,et al.  Postseismic deformation following the Landers earthquake, California, 28 June 1992 , 1994, Bulletin of the Seismological Society of America.

[21]  T. Jordan,et al.  Numerical Modelling of Instantaneous Plate Tectonics , 1974 .

[22]  Zuheir Altamimi,et al.  ITRF2000: A new release of the International Terrestrial Reference Frame for earth science applications , 2002 .

[23]  Timothy Ian Melbourne,et al.  Precursory transient slip during the 2001 Mw = 8.4 Peru earthquake sequence from continuous GPS , 2002 .

[24]  S. Stein,et al.  How rigid is the stable interior of the North American Plate , 1996 .

[25]  W. Peltier.  VLBI baseline variations from the Ice-4G Model of postglacial rebound , 1995 .

[26]  Steven M. Klosko,et al.  Observing tectonic plate motions and deformations from satellite laser ranging , 1985 .

[27]  J. Tuzo Wilson.  A possible origin of the Hawaiian Islands , 1963 .

[28]  H. Drewes.  Combination of VLBI, SLR and GPS Determined Station Velocities for Actual Plate Kinematic and Crustal Deformation Models , 1998 .

[29]  Michael Bevis,et al.  Motion and rigidity of the Pacific Plate and implications for plate boundary deformation , 2002 .

[30]  D. Jackson,et al.  Contemporary crustal deformation in east Asia constrained by Global Positioning System measurements , 2000 .

[31]  Timothy H. Dixon,et al.  REVEL: A model for Recent plate velocities from space geodesy , 2002 .

[32]  Z. Altamimi,et al.  The impact of a No‐Net‐Rotation Condition on ITRF2000 , 2003 .

[33]  Robert W. King,et al.  Imprint of the North American plate in Siberia revealed by GPS , 2003 .

[34]  D. McKenzie,et al.  The North Pacific: an Example of Tectonics on a Sphere , 1967, Nature.

[35]  S. Stein,et al.  Decelerating Nazca‐South America and Nazca‐Pacific Plate motions , 1999 .

[36]  S. Solomon,et al.  Some simple physical models for absolute plate motions , 1974 .

[37]  L. Zonenshain,et al.  Geodynamics of the Baikal rift zone and plate tectonics of Asia , 1981 .

[38]  A space geodetic target for mantle viscosity discrimination: Horizontal motions induced by glacial isostatic adjustment , 1998 .

[39]  Wenke Sun.  Asymptotic solution of static displacements caused by dislocations in a spherically symmetric Earth , 2004 .

[40]  C. G. Chase.  Plate kinematics: The Americas, East Africa, and the rest of the world , 1978 .

[41]  C. Kreemer,et al.  A no‐net‐rotation model of present‐day surface motions , 2001 .

[42]  J. Tuzo Wilson,et al.  Evidence from ocean islands suggesting movement in the Earth , 1965 .

[43]  Jeffrey T. Freymueller,et al.  Global Plate Velocities from the Global Positioning System , 1997 .

[44]  W. J. Morgan,et al.  Deep Mantle Convection Plumes and Plate Motions , 1972 .

[45]  C. G. Chase.  The N Plate Problem of Plate Tectonics , 1972 .

[46]  Yehuda Bock,et al.  GPS measurements of current crustal movements along the Dead Sea Fault , 2004 .

[47]  Yehuda Bock,et al.  Southern California permanent GPS geodetic array: Error analysis of daily position estimates and site velocities , 1997 .

[48]  Richard G. Gordon,et al.  Effect of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions , 1994 .

[49]  Kurt Lambeck,et al.  Tests of glacial rebound models for Fennoscandinavia based on instrumented sea‐ and lake‐level records , 1998 .

[50]  Paul Bodin,et al.  Using 1-Hz GPS Data to Measure Deformations Caused by the Denali Fault Earthquake , 2003, Science.

[51]  T. Dixon,et al.  New kinematic models for Pacific‐North America motion from 3 Ma to present, I: Evidence for steady motion and biases in the NUVEL‐1A Model , 1999 .

[52]  I. Shapiro,et al.  Geodesy by radio interferometry: Evidence for contemporary plate motion , 1986 .

[53]  Yehuda Bock,et al.  Crustal motion in Indonesia from Global Positioning System measurements , 2003 .

[54]  Thomas H. Jordan,et al.  Present‐day plate motions , 1977 .

[55]  Yehuda Bock,et al.  Error analysis of continuous GPS position time series , 2004 .