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Haiti Earthquake (12.01.2010, M7.0) surface shift estimation using TerraSAR-X data Christian Minet (1) , Michael Eineder (...
The Earthquake <ul><li>January 12, 2010 at 21:53:10 UTC  </li></ul><ul><li>18.443°N, 72.571°W, 13km depth </li></ul><ul><l...
The effects of the earthquake <ul><li>> 300,000 casualties </li></ul><ul><li>> 1.5 m homeless </li></ul><ul><li>> 5 bn € o...
Available Data <ul><li>TerraSAR-X Stripmap data (~3m resolution, 30 km swath) </li></ul><ul><li>39.1° & 40.9° incident ang...
TerraSAR-X interferograms <ul><li>Interferogram formation at remote Sensing Technology Institute, using DLR’s system GENES...
Incoherent Cross-Correlation <ul><li>Estimation of shift caused by parallax effects </li></ul><ul><ul><li>satellite orbit ...
Applied Corrections examples for ascending co-seismic datatakes <ul><li>Location accuracy of TerraSAR-X in the magnitude o...
Correlation results <ul><li>pre-, co- and post seismic LOS deformation retrieved from incoherent cross correlation </li></...
3D inversion <ul><li>y  observed displacement vector </li></ul><ul><li>C εε   covariance matrix of the measurement error <...
3D Results <ul><li>maximum uplift near Léogâne (~0.7 m) </li></ul><ul><li>Maximum shifts up to 0.5 m </li></ul><ul><li>gen...
Verification <ul><li>concordant with the general tectonic regime left-lateral strike-slip </li></ul><ul><li>deformation ma...
Outlook <ul><li>include more than 2 cross-correlation inputs </li></ul><ul><li>include and combine different sources </li>...
Sendai <ul><li>unfortunately no  crossing orbits available </li></ul><ul><li>~3m LOS displacement could be retrieved by in...
Thank You! Thank you to the Supersites Initiative and all contributors!
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Haiti Earthquake.ppt

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  • Transcript of "Haiti Earthquake.ppt"

    1. 1. Haiti Earthquake (12.01.2010, M7.0) surface shift estimation using TerraSAR-X data Christian Minet (1) , Michael Eineder (1) , Nestor Yague-Martinez (2) (1) German Aerospace Center (DLR), Remote Sensing Technology Institute (2) Starlab Living Science, Barcelona, Spain
    2. 2. The Earthquake <ul><li>January 12, 2010 at 21:53:10 UTC </li></ul><ul><li>18.443°N, 72.571°W, 13km depth </li></ul><ul><li>~25 km wsw of Port-au-Prince </li></ul><ul><li>left-lateral strike slip faulting and compression between the Caribbean and North American Plate </li></ul><ul><ul><li>Septentrional fault system </li></ul></ul><ul><ul><li>Enriquillo-Plantain Garden fault system </li></ul></ul>source: USGS
    3. 3. The effects of the earthquake <ul><li>> 300,000 casualties </li></ul><ul><li>> 1.5 m homeless </li></ul><ul><li>> 5 bn € of economic loss </li></ul><ul><li>collapse of thousands of buildings </li></ul><ul><li>large-scale destruction of infrastructure </li></ul><ul><li>triggering of landslides </li></ul><ul><li>“ change” of topography </li></ul>
    4. 4. Available Data <ul><li>TerraSAR-X Stripmap data (~3m resolution, 30 km swath) </li></ul><ul><li>39.1° & 40.9° incident angle </li></ul><ul><li>Data acquisition thanks to DLR’s Center for satellite Based crisis Information (ZK) and the activation of the “International Charter Space and Major Disasters” </li></ul>ascending path (22:54 UTC) 25.01.2010 post- seismic 14.01.2010 co- seismic 18.02.2009 pre- seismic 17.09.2008 descending path (10:44 UTC) 31.01.2010 co- seismic 04.11.2009 n/a n/a
    5. 5. TerraSAR-X interferograms <ul><li>Interferogram formation at remote Sensing Technology Institute, using DLR’s system GENESIS </li></ul><ul><li>compensation of topography using SRTM 3” Digital Elevation Model </li></ul><ul><li>multilooking of 20x20 </li></ul>59 m 154 days 20 m 330 days 94 m 11 days pre co post
    6. 6. Incoherent Cross-Correlation <ul><li>Estimation of shift caused by parallax effects </li></ul><ul><ul><li>satellite orbit state vectors (<5 cm accuracy) </li></ul></ul><ul><ul><li>SRTM 3” DEM </li></ul></ul><ul><li>geometric shift estimation as a-priori information </li></ul><ul><li>128x128 px regular grid (270 m x 238 m) </li></ul><ul><li>=> signal shifts </li></ul><ul><li>displacement = signal shifts – geometric shifts </li></ul>
    7. 7. Applied Corrections examples for ascending co-seismic datatakes <ul><li>Location accuracy of TerraSAR-X in the magnitude of a few centimeters </li></ul><ul><li>Corrections necessary for: </li></ul><ul><ul><li>Solid Earth Tides – numbers from simulation </li></ul></ul><ul><ul><li>Zenith path delays – Permanent GPS Station </li></ul></ul><ul><li>SET [m] at Port-au-Prince (North, East, Up) </li></ul><ul><li>18.02.2009 0.012818, 0.025078, 0.088032 </li></ul><ul><li>14.01.2010 0.006799, 0.015156, -0.140888 </li></ul><ul><li>Zenith path delays from SCUB </li></ul><ul><ul><li>18.02.2009 2439.3 mm </li></ul></ul><ul><ul><li>14.01.2010 2534.0 mm </li></ul></ul><ul><ul><li>near Satiago de Cuba, > 300 km distance </li></ul></ul>=> ~22 cm => ~9.5 cm
    8. 8. Correlation results <ul><li>pre-, co- and post seismic LOS deformation retrieved from incoherent cross correlation </li></ul><ul><li>colors and arrows indicate size and directions of LOS displacement </li></ul><ul><ul><li>combination of estimated range and azimuth displacements </li></ul></ul>pre co post
    9. 9. 3D inversion <ul><li>y observed displacement vector </li></ul><ul><li>C εε covariance matrix of the measurement error </li></ul><ul><li>K transformation matrix </li></ul><ul><li>estimated 3D-displacement vector </li></ul><ul><li>pixel by pixel basis </li></ul><ul><li>leas squares solution </li></ul><ul><li>maximum likelihood estimator </li></ul>
    10. 10. 3D Results <ul><li>maximum uplift near Léogâne (~0.7 m) </li></ul><ul><li>Maximum shifts up to 0.5 m </li></ul><ul><li>general direction at EPGF can be retrieved </li></ul>
    11. 11. Verification <ul><li>concordant with the general tectonic regime left-lateral strike-slip </li></ul><ul><li>deformation matches Antony Sladens (Caltech) prediction derived from waveform inversion </li></ul><ul><li>uplift matches in-situ observations (Hayes et al, 2010) </li></ul><ul><ul><li>uplift of microatolls near Léogane: 0.64 ± 0.11m, patch reef bleeching </li></ul></ul><ul><ul><li>change of coastline due to the uplift </li></ul></ul><ul><li>ALOS & SPOT 5 data yield corresponding results </li></ul>G. P. Hayes et al “Complex rupture during the 12 January 2010 Haiti earthquake,” NATURE GEOSCIENCE, Vol. 3, Macmillan Publishers Limited, pp. 800-805, November 2010.
    12. 12. Outlook <ul><li>include more than 2 cross-correlation inputs </li></ul><ul><li>include and combine different sources </li></ul><ul><ul><li>unwrapped interferograms of all available sensors </li></ul></ul><ul><ul><li>permanent GPS stations </li></ul></ul><ul><li>implementation of full error propagation </li></ul><ul><li>refinement of path delay </li></ul><ul><ul><li>verification of weather models using Corner reflectors </li></ul></ul><ul><li>experiments on location accuracy continue, using corner reflectors </li></ul>
    13. 13. Sendai <ul><li>unfortunately no crossing orbits available </li></ul><ul><li>~3m LOS displacement could be retrieved by incoh. cross-correlation </li></ul><ul><li>deformation map showing wide spread effects by combination of several pairs => FRINGE 2011 </li></ul>
    14. 14. Thank You! Thank you to the Supersites Initiative and all contributors!
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