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S eismic wave P ropagation and I maging in C omplex media: a E uropean network

S eismic wave P ropagation and I maging in C omplex media: a E uropean network. MARTIN G ÁLIS Early Stage Researcher Host Institution: Charles University, Prague Place of Origin: Bratislava, Slovakia Appointment Time: Jan 2005 – Mar 2005 Jan 2006 –

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S eismic wave P ropagation and I maging in C omplex media: a E uropean network

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  1. Seismic wave Propagation and Imaging in Complex media: a European network • MARTIN GÁLIS • Early Stage Researcher • Host Institution:Charles University, Prague • Place of Origin:Bratislava, Slovakia • Appointment Time:Jan 2005 – Mar 2005 • Jan 2006 – • Project:Numerical simulation of rupture propagation • and seismic motion • Task Groups: TG Local Scale, TG Numerical Methods • Cooperation: INGV Bologna, Comenius University, Bratislava

  2. Seismic wave Propagation and Imaging in Complex media: a European network • MARTIN GÁLIS • Early Stage Researcher • Host Institution:Charles University, Prague • Place of Origin:Bratislava, Slovakia • Appointment Time:Jan 2005 – Mar 2005 • Jan 2006 – • Project: SPICE Code Validation • Task Groups: TG Local Scale, TG Numerical Methods • Cooperation: INGV Bologna, Comenius University, Bratislava

  3. Seismic wave Propagation and Imaging in Complex media: a European network • MARTIN GÁLIS • Early Stage Researcher • Host Institution:Charles University, Prague • Place of Origin:Bratislava, Slovakia • Appointment Time:Jan 2005 – Mar 2005 • Jan 2006 – • Project: • SPICE Code Validation • Numerical simulation of rupture propagation • and seismic motion • Task Groups: TG Local Scale, TG Numerical Methods • Cooperation: INGV Bologna, Comenius University, Bratislava

  4. The SPICE Code Validation The SPICE Code Validationis coordinated byPeter Moczo(Comenius University, Bratislava, Slovakia)in close cooperation with Jean-Paul Ampuero(ETH Zürich, Switzerland) and Steven M. Day(San Diego State University, San Diego, USA)

  5. General Remarkson SPICE Code Validation The SPICE Code Validation and the Model Setsshould serve as a long-term basis ( even after the SPICE project is completed )for possible tests and comparisons The possibility to test methods/codesshould be open and user-friendlyfor anybody interestedin the use of the SPICE Code Validation models

  6. General Remarkson SPICE Code Validation The Model Sets should be designed such thatnew models could be addedin correspondence with progressin the numerical modeling methods The long-term plan may include modelsfor which we do not know reference solutions at presentbut it is very likely that the models/problemswill be addressed in near future

  7. General Remarkson SPICE Code Validation Based on the evaluation of the SCEC Code Validationandcapabilities of recent numerical-modeling methodstwo model sets were elaborated: Wave Propagation ( WP ) Model Set Source Dynamics ( SD ) Model Set

  8. Review Table of SCEC Models

  9. SPICE Wave Propagation Model Set SPICE Subset WP ISimplest canonical modelsdesigned to test accuracy of the schemes/codeswith respect to individual factors/featuresof the models including ABCs ( includes SCEC_UHS1 and SCEC_UHS2 ) SPICE Subset WP IICanonical models combining two or more basic structural features ( includes SCEC_LOH1 and SCEC_LOH3) SPICE Subset WP IIIRealistic models ( includes SCEC_SC2.1 and SCEC_SC2.2)

  10. SPICE Subset WP ISimplest canonical modelsdesigned to test accuracy of the schemes/codeswith respect to individual factors/features of the models including ABC ( includes SCEC_UHS1 and SCEC_UHS2 ) • homogeneous elastic space : dispersion, local error • homogeneous viscoelastic space : incorporation of attenuation • 2 homogeneous halfspaces : planar interface coinciding with a grid plane parallel with a grid plane non-parallel with a grid plane • elastic interface viscoelastic/pure_Q interface • homogeneous halfspace : planar free surface • homogeneous anisotropic elastic space : anisotropy

  11. SPICE Subset WP IICanonical modelscombining two or more basic structural features ( includes SCEC_LOH1 and SCEC_LOH3 ) • layer over halfspace :planar interface + free surfacecoinciding with a grid planeparallel with a grid planenon-parallel with a grid planeelastic and viscoelastic source inside layer, source in the halfspace • layer over halfspace :gradient in velocity / Q • layer over halfspace :random velocity distribution

  12. SPICE Subset WP II - ContinuedCanonical modelscombining two or more basic structural features ( includes SCEC_LOH1 and SCEC_LOH3 ) • soft inclusion in a halfspace :lateral heterogeneityinterfaces coinciding with a grid planeparallel with a grid planenon-parallel with a grid plane • vertical layer in a halfspace : interface at the free surface • 2 homogeneous halfspaces : non-planar interface • free-surface topography : traction-free conditionon non-planar surface Gaussian hill cliff slope

  13. SPICE Subset WP IIIRealistic models ( includes SCEC SC_2.1 and SCEC SC_2.2 ) • - Colfiorito, Central Italy : laterally bounded sedimentary basin • in coordination with the INGV, Rome • Grenoble, France : deep Alpine valleyin coordination with the ESG-2006, Grenoble, benchmark

  14. SPICE Source Dynamics Model Set (visco)elastic parameters friction laws initial stress nucleation combined with geometriesoutlined in the subsets I and II SPICE Subset SD I simplest canonical models SPICE Subset SD IIcanonical models SPICE Subset SD IIIrealistic models ( preliminary )

  15. 1 SPICE Subset SD I simplest canonical models test standard friction laws: slip weakening, velocity weakening, rate-and-state friction

  16. 1 2 5 4 3 6 7 8 SPICE Subset SD IIcanonical models

  17. SPICE Subset SD IIIRealistic Models test standard friction laws: velocity weakening, rate-and-state friction +includingfluid interactions, thermal effects, damage mechanics, …

  18. Short-term Code ValidationDuring the SPICE Project Model Set

  19. Evaluation Criteria ( Metrics ) • Integral amplitude ( envelope ) misfit • Integral phase misfit • Time-dependent amplitude ( envelope ) misfit • Time-dependent phase misfit • Frequency-dependent amplitude ( envelope ) misfit • Frequency-dependent phase misfit • Time-frequency amplitude ( envelope ) misfit • Time-frequency phase misfit

  20. Evaluation Criteria ( Metrics ) The misfit criteria were developed byKristeková, Kristek, Moczo and Day (2006). Misfit Criteria for Quantitative Comparison of Seismograms,Submitted to BSSA. You can download the pdf from ftp://ftp.nuquake.sk/pub/Papers/Misfit_Criteria_KKMD.pdf

  21. SPICE Code Validation Website

  22. First Official Announcement The first official email-announcementwith the first deadlineswill be sent to the SPICE communityon February 20, 2006

  23. Thank you for your attention!

  24. Time-frequencyAmplitude ( envelope ) and Phase Misfits

  25. Frequency-dependentAmplitude ( envelope ) and Phase Misfits

  26. Time-dependent Amplitude ( envelope ) and Phase Misfits

  27. Integral Amplitude ( envelope ) and Phase Misfits

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