www.spice-rtn.org mid-term review meeting, february 13-14, tutzing seismic wave propagation and...

www.spice-rtn.orgMid-Term Review Meeting, February 13-14, Tutzing

Seismic wave Propagation and Imaging in

Complex media: a European network

MARTIN GÁLISEarly Stage Researcher

Host Institution: Charles University, PraguePlace of Origin: Bratislava, SlovakiaAppointment Time: Jan 2005 – Mar 2005

Jan 2006 –

Project: Numerical simulation of rupture propagationand seismic motion

Task Groups: TG Local Scale, TG Numerical Methods

Cooperation: INGV Bologna, Comenius University, Bratislava



Jan 2006 –

Project: Numerical simulation of rupture propagationand seismic motion








Jan 2006 –

Project: SPICE Code Validation





Jan 2006 –

Project: SPICE Code Validation








Jan 2006 –

Project:SPICE Code Validation

Numerical simulation of rupture propagationand seismic motion





Jan 2006 –

Project:SPICE Code Validation

Numerical simulation of rupture propagationand seismic motion




The SPICE Code Validation

The SPICE Code Validationis coordinated by

Peter 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)


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-friendly

for anybody interestedin the use of the SPICE Code Validation models



The Model Sets should be designed such thatnew models could be added

in correspondence with progressin the numerical modeling methods

The long-term plan may include modelsfor which we do not know reference solutions at present

but it is very likely that the models/problemswill be addressed in near future


Based on the evaluation of the SCEC Code Validationand

capabilities of recent numerical-modeling methodstwo model sets were elaborated:

Wave Propagation ( WP ) Model Set

Source Dynamics ( SD ) Model Set



Model Name

Geometry VS VP VP/VS QS QP SourceFreq.Range

ABC Purpose / NoteSPICE Subset

UHS1 halfspace 3 464 6 000 1.73 inf. inf.DCP

0.58 λs (1 Hz)0 - 5 distant reference solution WP I

UHS2 halfspace 3 464 6 000 1.73 inf. inf.DCP

0.58 λs (1 Hz)0 - 5 close accuracy of ABC WP I

LOH11000 m layer /

halfspace2 0003 464

4 0006 000

2 / 1.73 inf. inf.DCP

0.58 λs (1 Hz)0 - 5 distant

presence of a layer ;interface ona grid plane

WP II

LOH21000 m layer /

halfspace2 0003 464

4 0006 000

2 / 1.73 inf. inf.Fin. Kin.

on a grid plane0 - 5 distant

LOH1+ FinKinSourceon a grid plane

SD I

LOH31000 m layer /

halfspace2 0003 464

4 0006 000

2 / 1.7340

69.3const.

120155.9const

DCP0.58 λs (1 Hz)

0 - 5 distantLOH1

+ AttenuationWP II

LOH41000 m layer /

halfspace2 0003 464

4 0006 000

2 / 1.73 inf. inf.Fin. Kin.

general pos.0 - 5 distant

LOH1+ FinKinSource

in a general positionSD I

SC2.1realistic model

SFv/LAb complex structure WP III

SC2.2realistic model

SFv/LAb

simplifiedcomplex structure

WP III

Review Table of SCEC Models


SPICE Wave Propagation Model Set

SPICE Subset WP ISimplest canonical models

designed to test accuracy of the schemes/codeswith respect to individual factors/features

of 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 )


SPICE Subset WP ISimplest canonical models

designed 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 planeparallel with a grid planenon-parallel with a grid plane

elastic interfaceviscoelastic/pure_Q interface

- homogeneous halfspace : planar free surface

- homogeneous anisotropic elastic space : anisotropy


- layer over halfspace : planar interface + free surface

coinciding with a grid planeparallel with a grid planenon-parallel with a grid plane

elastic and viscoelasticsource inside layer, source in the halfspace

- layer over halfspace : gradient in velocity / Q

- layer over halfspace : random velocity distribution

SPICE Subset WP IICanonical models

combining two or more basic structural features( includes SCEC_LOH1 and SCEC_LOH3 )


- soft inclusion in a halfspace : lateral heterogeneity

interfaces 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 hillcliffslope

SPICE Subset WP II - ContinuedCanonical models

combining two or more basic structural features( includes SCEC_LOH1 and SCEC_LOH3 )


- Colfiorito, Central Italy : laterally bounded sedimentary basin

in coordination with the INGV, Rome

- Grenoble, France : deep Alpine valley

in coordination with the ESG-2006, Grenoble, benchmark

SPICE Subset WP IIIRealistic models

( includes SCEC SC_2.1 and SCEC SC_2.2 )


SPICE Source Dynamics Model Set

SPICE Subset SD Isimplest canonical models

SPICE Subset SD IIcanonical models

SPICE Subset SD IIIrealistic models ( preliminary )

(visco)elastic parametersfriction lawsinitial stressnucleation

combined with geometriesoutlined in the subsets I and II


1

SPICE Subset SD Isimplest canonical models

test standard friction laws:slip weakening, velocity weakening, rate-and-state friction


1 2

3 4 5

6 7 8

SPICE Subset SD IIcanonical models


SPICE Subset SD IIIRealistic Models

test standard friction laws:velocity weakening, rate-and-state friction

+includingfluid interactions, thermal effects, damage mechanics, …


Short-term Code ValidationDuring the SPICE Project

Model Set

•Unbounded homogeneous space elastic, viscoelastic

• Homogeneous halfspaceelastic, viscoelastic

• Layer over halfspaceconstant velocity

~ point DC source~ finite kinematic

sourcevelocity gradient

• Two homogeneous layers over halfspace

H1 / H2 = (√5 -1) / 2

• 3D soft inclusion in the halfspace

Moon ( Croissant ) valley

• 3D free-surface topographyGaussian hill

• Realistic modelGrenoble Valley

ESG 2006 (Grenoble) benchmark

• Source dynamics model


• 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

Evaluation Criteria ( Metrics )


The misfit criteria were developed by

Kristeková, 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

Evaluation Criteria ( Metrics )


SPICE Code Validation Website


The first official email-announcementwith the first deadlines

will be sent to the SPICE communityon February 20, 2006

First Official Announcement


Thank you for your attention!


Time-frequencyAmplitude ( envelope ) and Phase Misfits

,

,,

max ,t f REF

E t fTFEM t f

W t f

,

,,

max ,t f REF

P t fTFPM t f

W t f

, , ,REFE t f W t f W t f

Arg , Arg ,

, ,REF

REF

W t f W t fP t f W t f


Frequency-dependentAmplitude ( envelope ) and Phase Misfits

,

max ,

t

f REF t

E t fFEM f

W t f

,

max ,

t

f REF t

P t fFPM f

W t f

1 1, , , , ,

t tt tT T

E t f E t f P t f P t fN N


Time-dependentAmplitude ( envelope ) and Phase Misfits

,

max ,

f

t REF f

E t fTEM t

W t f

,

max ,

f

t REF f

P t fTPM t

W t f

1 1, , , , ,

f ff fF F

E t f E t f P t f P t fN N


IntegralAmplitude ( envelope ) and Phase Misfits

2

2

,

,

f t

REFf t

E t fEM

W t f

2

2

,

,

f t

REFf t

P t fPM

W t f

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