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Geohazard Supersites and Natural Laboratories

Geohazard Supersites and Natural Laboratories. Report to DLR Falk Amelung, GEO task leader September 2011. Hawaii Supersite. Hawaii Supersite (1) : Kilauea crater rim instability. Halemaumau crater. TerraSAR -X interferogram. Summit vent. p rocessed using 30 m DEM.

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Geohazard Supersites and Natural Laboratories

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  1. Geohazard Supersites and Natural Laboratories Report to DLR Falk Amelung, GEO task leader September 2011

  2. Hawaii Supersite

  3. Hawaii Supersite (1) : Kilauea crater rim instability Halemaumau crater TerraSAR-X interferogram Summit vent processed using 30 m DEM Richter & Poland, HVO Photos: HVO

  4. Hawaii Supersite (1) : Kilauea crater rim instability Halemaumau crater TerraSAR-X interferogram Summit vent processed using 3 m DEM Richter & Poland, HVO Photos: HVO

  5. Hawaii Supersite (1) : Kilauea crater rim instability TerraSAR-X interferogram Summit vent processed using 3 m DEM Richter & Poland, HVO

  6. Hawaii Supersite (1) : Kilauea crater rim instability Growth with time Richter & Poland, HVO

  7. Hawaii Supersite (2) : Slow Slip Event at Kilauea • We are looking for a 0.5 fringe signal near the coast in this image • Atmospheric artifacts dominate the signal in each interferogram • Will use time series methods to extract the signature Interferograms courtesy PiyushAgram From Howard Zebker, Stanford University

  8. Kilauea rift eruption March 2011 A propagating fissure (surface expression of a dike)

  9. Hawaii Supersite (3) : Kilauea’s magma system LOS velocity from SBAS time-series February 2011 intrusion Post-intrusion inflation GPS station inside caldera Envisat TSX Intrusion causes step in time series! Displacement [cm] ALOS GPS Baker and Amelung, U of Miami

  10. Mt. Etna Supersite

  11. Mean deformation velocity < -6 > 6 cm/year Mt. Etna Supersite: TerraSAR-X Descending OrbitsTime Interval:Sep 2008 – Dec 200927 acquisitions76 InterferogramsGround Resolution: ~ 30 metersLook Angle: 42.9 deg

  12. TerraSAR-X 30x30 m ENVISAT vs. TerraSAR-X: Spatial Coverage ENVISAT 90x90 m

  13. TerraSAR-X: 11 days ENVISAT: 35 days TerraSAR-X vs. ENVISAT: Time Sampling

  14. Tohoku-oki earthquake Supersite

  15. Tohoku-Oki earthquake event Supersite Pixel tracking offset of M 6.6 aftershock of April 11 Colorscale 3 m 17 March, 19 April images E. Fielding, JPL

  16. Hispaniola Supersite USGS open file report • Septentrional fault: • GPS: ~10 mm/yr slip rate • Last earthquake about 1230 A.D. • (8 m displacement accumulated) •  magnitude 7.5-8 overdue! • seismic hazard very high in • Dominican Republic! • pop. 10 million, 5 million tourists/yr • minimal seismic network (2 people)

  17. Hispaniola Supersite Objective: estimate seismic hazard in Santiago, D. R. (2 million pop.) TerraSAR-X interferograms Expected signal 11 days 22 days ~5 mm/yr LOS velocity Coherence sufficient  slip rate measurement possible with 2-3 years of data! Need acquisitions every 11-22 days ! Fattahi, Wdowinski, Amelung, U of Miami

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