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Ground deformation at Etna and MiyakeJima from interferometric PALSAR ALOS data

Ground deformation at Etna and MiyakeJima from interferometric PALSAR ALOS data. Pierre Briole 1 , Panagiotis Elias 2 , Giuseppe Puglisi 3 , Makoto Murakami 4

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Ground deformation at Etna and MiyakeJima from interferometric PALSAR ALOS data

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  1. Ground deformation at Etna and MiyakeJima from interferometric PALSAR ALOS data Pierre Briole1, Panagiotis Elias2, Giuseppe Puglisi3, Makoto Murakami4 (1) Ecole Normale Supérieure, (2) National Observatory Athens, (3) Istituto Nazionale di Geofisica e Vulcanologia, (4) Hokkaido University ALOS PI Symposium 2008

  2. Etna recent lava flows

  3. ERS SAR interferogram 1995-1999 J.L. Froger 2000 Data processed with Diapason software

  4. PS-Insar at Etna Offset across the Pernicana fault measured by PS-InSAR and in the field PS processing: TRE 2002

  5. 2006: inflation and eruption in September Inflation before the eruption of Sept 4, 2006 Processing: ROI-PAC filtered, INGV 2007 ENVISAT 11 May 2005 – 26 April 2006

  6. 2007: summit eruptions, inflation, creep along faults April 2007 summit activity Ground deformation from GPS data Processing at INGV-CT with ROI-PAC and GAMIT ENVISAT - 7 Nov 2007 – 26 Mar 2008

  7. 11 available ascending PALSAR scenes eruption

  8. ALOS 30 Oct 2007 – 15 Dec 2007 (245m)

  9. ALOS 27 Jan 2007 – 16 Sept 2008 (1309m)

  10. Creep along Pernicana fault

  11. 27/1/2007 – 16/9/2008 (18 months)

  12. Coherence and subsidence of lava flows

  13. 30/10 – 15/12 2007 (1.5 months)

  14. 27/1/2007 – 16/9/2008 (18 months)

  15. Valle del Bove (2006 & 2008 eruptions area)

  16. 30/10 – 15/12 2007 (1.5 months)

  17. 27/1/2007 – 16/9/2008 (18 months)

  18. MiyakeJima volcano Last eruptions : 1940, 1962, 1983, 2000

  19. Ground motion 1998-2008 (horizontal) GSI, 2008

  20. Ground motion 1998-2008 (vertical) GSI, 2008

  21. Ground motion 2007-2008 (horizontal) GSI, 2008

  22. Ground motion 2007-2008 (vertical) GSI, 2008

  23. 8 available ascending PALSAR scenes

  24. 8 available descending PALSAR scenes

  25. MiyakeJima volcano

  26. 30 Oct 07 – 15 Dec 07 – A.261m (1.5 months)

  27. 11 Sep 06 – 30 Jul 07 – A.625m (10.5 months)

  28. 12 Sept 06 – 17 Sept 08 – D.280m (24 months)

  29. Conclusions • No ground motion detected at MiyakeJima volcano • Various phenomena at Etna, like with Cband observations (classical or PS) but coherence better in all types of surfaces • All baselines work but much better results with short baselines • 3-4mm detectability for SW with standard software (close to Cband), LW detectability linked to atmosphere (like in Cband) • Ascending PALSAR data acquired regularly would be great for ground deformation monitoring • Quick-looks at http://idaios.space.noa.gr/pub/

  30. Thanks to JAXA for having made ALOS Yes, we can!

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