GPS for real-time earthquake source determination and tsunami warning systems

We identify the key design aspects of a GPS-based system (and in the future, GNSS-based systems) that could contribute to real-time earthquake source determination and tsunami warning systems. Our approach is based on models of both transient and permanent displacement of GPS stations caused by large earthquakes, while considering the effect of GPS errors on inverted earthquake source parameters. Our main conclusions are that (1) the spatial pattern, magnitude, and timing of permanent displacement of GPS stations can be inverted for the earthquake source and so predict the 3D displacement field of the ocean bottom, thus providing the initial conditions for tsunami models, and (2) there are no inherently limiting factors arising from real-time orbit and positioning errors, provided sufficient near-field GPS stations are deployed. This signal could be readily exploited by GPS networks currently in place, and will be facilitated by the IGS Real-Time Project as it comes to fruition.

[1]  Robert J. Geller,et al.  Scaling relations for earthquake source parameters and magnitudes , 1976 .

[2]  H. Kanamori,et al.  A moment magnitude scale , 1979 .

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

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

[5]  Michael B. Heflin,et al.  Orbit Determination with NASA's High Accuracy Real-Time Global Differential GPS System , 2001 .

[6]  Vasily V. Titov,et al.  Real-Time Tsunami Forecasting: Challenges and Solutions , 2003 .

[7]  WangRongjiang,et al.  Computation of deformation induced by earthquakes in a multi-layered elastic crust , 2003 .

[8]  Michael R. Craymer,et al.  Current tectonics of northern Cascadia from a decade of GPS measurements , 2003 .

[9]  Penina Axelrad,et al.  Modified sidereal filtering: Implications for high‐rate GPS positioning , 2004 .

[10]  Emile A. Okal,et al.  Seismology: Speed and size of the Sumatra earthquake , 2005, Nature.

[11]  Richard A Kerr,et al.  Failure to Gauge the Quake Crippled the Warning Effort , 2005, Science.

[12]  A strategy to rapidly determine the magnitude of great earthquakes , 2005 .

[13]  Shunichi Koshimura,et al.  Tsunami due to the 2004 September 5th off the Kii peninsula earthquake, Japan, recorded by a new GPS buoy , 2005 .

[14]  Jeroen Tromp,et al.  Earth's Free Oscillations Excited by the 26 December 2004 Sumatra-Andaman Earthquake , 2005, Science.

[15]  Rongjiang Wang,et al.  Erratum to: "Computation of deformation induced by earthquakes in a multi-layered elastic crust - FORTRAN programs EDGRN/EDCMP": [Computers & Geosciences, 29(2) (2003) 195-207] , 2006, Comput. Geosci..

[16]  F. Rocca,et al.  Space geodesy: Subsidence and flooding in New Orleans , 2006, Nature.

[17]  Basara Miyahara,et al.  Real-time capability of GEONET system and its application to crust monitoring , 2006 .

[18]  A Canadian Pilot Project for a GPS-Augmented Tsunami Warning System , 2006 .

[19]  Hans-Peter Plag,et al.  Rapid determination of earthquake magnitude using GPS for tsunami warning systems , 2006 .

[20]  Hans-Peter Plag.  GGOS and it User Requirements, Linkage and Outreach , 2007 .

[21]  The Global Geodetic Observing System , 2007 .

[22]  Jens Schröter,et al.  Tsunami early warning using GPS‐Shield arrays , 2007 .

[23]  Thorkild Aarup,et al.  Understanding sea-level rise and variability: report of UNESCO Workshop, Paris, June 2006 , 2007 .

[24]  Y. Song,et al.  Detecting tsunami genesis and scales directly from coastal GPS stations , 2007 .

[25]  Susanna Zerbini,et al.  Geodetic Observations Help Scientists Understand Geohazards and Mitigate Disasters , 2008 .

[26]  Chen Ji,et al.  The role of horizontal impulses of the faulting continental slope in generating the 26 December 2004 tsunami , 2008 .

[27]  M. Rothacher,et al.  The Global Geodetic Observing System , 2007 .

[28]  Chung-Yen Kuo,et al.  Geodetic Observations and Global Reference Frame Contributions to Understanding Sea‐Level Rise and Variability , 2010 .

[29]  Understanding Sea-Level Rise and Variability , 2011 .