Earthquake visualization

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Earthquake visualization

• Rodolfo Allendes
• VVR group 10th August 2006

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This presentation

• The problem
• My project
• Implementation details
• First steps
• Final solution
• Evaluation
• What is next?

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The problem

• IEEE Visualization Contest 2006 (look whats
  shaking)
• Data from simulation of a Mw7,7 Earthquake in the
  California area.
• Velocity vector field.
• 227 time steps
• Divided into X, Y Z components
• Volume 750x375x100
• Required storage 227x3x100Mb 68GB.
• Velocity mesh (stiffness, scalar).
• Visualize the data to help answer seismology
  related questions.

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Domain Questions

• Do the waves in the Whittier-Narrows area follow
  a pronounced sediment channel defined in the
  crustal structure?
• Do waves systematically focus toward the centers
  of basins, thus providing a physical explanation
  of the correlation of amplification factors with
  basin depth?
• At which locations do the largest conversions
  between wave-types occur?
• Which regions produce wave reflections?
• Do strongly shaken basins act as wave sources?

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My Project

• Based in the IEEE contest.
• Aim
• to provide an effective method for the
  visualization of earthquake simulated data
  generated for the California (U.S) area that
  could help experts in the field answer domain
  related questions

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First Steps

• Basic geology
• Different earthquake waves
• Influence of sedimentary basins in the
  propagation of earthquake waves
• Look at the data
• Integrate the velocity field into a single file
  speed magnitude
• Search for evidence of the influence of
  sedimentary basins in the speed
• Search for interesting speed magnitudes

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Some Considerations

• Use of only a subset of the available data.
• Use of other data to provide geographical
  references for the volume of study State of
  California map.

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Tools

• Software
• Microsoft Visual Studio 6
• VTK 5.0
• Video Editing Software (VirtualDubMod)
• Hardware
• Dell Inspiron 600m, 1.67GHz, 512 Ram 40 GB hard
  drive
• Recordable DVDs for external storage

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First Steps (cont)

• Visualization

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(No Transcript)
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Evaluation

• Two types of evaluation
• Permanent inspection of temporal results (focused
  in visualization techniques)
• Presentation of a tentative final solution to a
  seismology expert

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Evaluation Results

• Three of the five proposed questions are directly
  addressed by the visualization (1, 2 5)
• Additions based on the evaluation were included
• Direction for future development and suggestions
  on how to address the remaining questions

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Final Result (video)

• What will you see?
• California area and volume of study
• Location of basins within the volume is close to
  surface
• Surface magnitude of the speed through time
• At time step 90, this animation stops to show (by
  moving the slice in depth) the influence of
  sedimentary basins
• Close-up view of surface speed and basin

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Final Result (video)
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What is next?

• Contest deadline for submission is tomorrow
• to submit or not to submit?
• Final MSc report

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Summary

• Review of the IEEE visualization design contest
  2006
• The MSc project based in this contest
• Development Process and Final Result
• Next steps

Thank you for listening and the help provided