Seismic wave Propagation and Imaging in Complex media: a European network Suggestions for synthetic data storage

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Seismic wave Propagation and Imaging in Complex
media a European networkSuggestions for
synthetic data storage
H., Igel, J. Wassermann, M. Stupazzini
(Munich) J.-P. Vilotte (IPG Paris) B. Dost, T.
Van Eck (ORFEUS)

• The SPICE project
• Expected seismic simulation data
• Results of ORFEUS/SPICE Meeting May 7, 2004
• Examples

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Seismic wave Propagation In Complex media a
European network

• Marie Curie Research Training network in the 6th
  Framework Programme (Coordination Munich
  seismology)
• 14 institutions (INGV Rome, IPG, ENS Paris,
  Oxford, Utrecht, Munich, Bratislava, Prague,
  Oslo, Dublin, Naples, Hamburg, Trieste, Zurich)
• 14 postdocs and 14 PhDs, 4-year project (start
  2004)
• Training workshops, development of training
  material
• Four task groups in the fields of (1) Global
  seismology, (2) volcano seismology and reservoir
  seismics, (3) earthquake physics and (4) digital
  library

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Expected simulation dataVolcano seismology
Example Merapi volcano, Indonesia
From Ripperger, Igel, Wassermann, 2004
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Expected simulation dataDynamic rupture
Example Rupture at material interfaces
From Brietzke and Ben-Zion, 2004
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Expected simulation dataEarthquake scenarios
Roermond earthquake M5.9, 1992 Cologne basin
Germany
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Expected simulation data Global seismology
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ORFEUS-SPICE Meeting May 7, 2004 Results 1/2

• SEED/miniSEED seems to be the most appropriate
  synthetic data format for compatibility with the
  observational IT infrastructure
• We defined three synthetic data types
• Type 1 Synthetic data (seismograms) that have
  been calculated for specific past earthquakes and
  are available for existing seismometer locations.
  These synthetic data should be stored with the
  corresponding UTC timing for the pre-determined
  origin time.
•  
• Type 2 Synthetic data (seismograms) for virtual
  earthquakes calculated for virtual networks. This
  could correspond to potential earthquake
  scenarios in a particular region and the virtual
  network could consist of the 2-D surface grid
  points (e.g. 2-D array) where synthetic
  seismograms have been calculated.
• Type 3 Synthetic seismogram data (i.e. complete
  wave fields) that are available for a 3D volume
  (e.g. sedimentary basin, whole Earth).

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ORFEUS-SPICE Meeting May 7, 2004 Results 2/2

• Additional header information for Synthetic data
  types (Metadata) must include at least

• a pointer to information on the model structure
• the numerical method employed
• simulation information (e.g. valid frequency
  range of simulation, physical approximations,
  etc.)
• earthquake source information
• identification (software author, date of data
  generation, etc.)

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Examples Data Type 1Observations (X) and
Synthetics (?)
If you read event data, a flag (?) indicates that
synthetics are available
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Examples Data Type 1Observations (X) and
Synthetics (?)
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Examples Data Type 2virtual earthquake, virtual
array
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Necessary developments

• International working group and schedule for
  implementation
• Multi-national agreement on synthetic data format
• Provision for multi-component (gt3C) data (e.g.
  strains, rotations, atmospheric parameters)
• Coordinated software development for data access,
  visualization etc.
• Development of a test data base accessible to the
  community with feed-back options