Lagios_et_al_IGARSS_2011.ppt
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    Lagios_et_al_IGARSS_2011.ppt Lagios_et_al_IGARSS_2011.ppt Presentation Transcript

    • NATIONAL AND KAPODISTRIAN UNIVERSITY OF ATHENS FACULTY OF GEOLOGY & GEOENVIRONMENT DEPARTMENT OF GEOPHYSICS & GEOTHERMICS Laboratory of Remote Sensing GROUND DEFORMATION STUDIES IN CEPHALONIA ISLAND (WESTERN GREECE) BASED ON DGPS & PS INTERFEROMETRY Evangelos Lagios, Vassilis Sakkas, Fabrizio Novali, Alfio Fumagalli & Sara Del Conte
      • The Central Ionian Islands GPS Networks
      • 24 bench marks in Cephalonia
      • 14 bench marks in Zakynthos
      • 4 bench marks in Ithaca
    • Seismic Activity 1964- 2006 ( M > 3.6 ) Seismic Activity 2006–Present ( M > 3.6 )
      • Lefkas Earthquake
      • August 14, 2003
      • Mw = 6.3
      • Zakynthos Seismic Activity
      • March- April 2006
    • Cephalonia Island
      • 24 GPS bench marks
    • DGPS Results 2001 - 2003 2003 - 2010
    • 2001-2010
    • PSInSAR TM product of Cephalonia Island Processed by Tele-Rilevamento Europa (TRE)
      • ERS descending:
        • 39 images
        • 4/19/1992 - 2/27/2000
      • ENVISAT descending:
        • 21 images
        • 6/25/2003 - 11/5/2008
    • Reference Station (No 06) ITRF 2005
    • ERS PS Descending (1992 – 2000) Velocity Field (mm/yr)
    • ENVISAT PS Descending (2003 - 2008) Velocity Field (mm/yr)
    • ERS Velocity Standard Deviation
    • ENVISAT Velocity Standard Deviation
    • V < 0 α < 0 V < 0 α > 0 V > 0 α < 0 V > 0 α > 0 PS Time-Series
    • ERS Acceleration Field V < 0 V > 0
    • ENVISAT Acceleration Field V < 0 V > 0
    • PS TIME-SERIES
    • Identification of Critical Area based on Observed Seismic Energy Released Star indicates the center of the two circles indicating L ow (inside small circle) and High seismic energy release (area between the two circles).
    • Identification of Critical Area based on Modelling of Observed Seismic Accelerating Strain
    • Critical Time Estimation based on Temporal Analysis of Seismicity
    • Critical Time Estimation based on Accelerating Seismicity