Large Data Visualization of Seismic Data (TeraShake)

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Large Data Visualization of Seismic Data
(TeraShake)

• Amit Chourasia
• Visualization Scientist
• Visualization Services
• Presented at SDSC Booth at SC05

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• movie

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About Terashake

• Large Scale Earthquake Simulation on Southern San
  Andreas
• 33 researchers, 8 Institutions
• Southern California Earthquake Center
• San Diego Supercomputer Center
• Information Sciences Institute
• Institute of Geophysics and Planetary Physics
  (UC) University of Southern California
• San Diego State University
• University of California, Santa Barbara
• Carnegie-Mellon University
• ExxonMobil

Slide Courtesy Marcio Faerman
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TeraShake Simulation Area

• Rectangular region parallel to San Andreas fault
  containing
• Los Angeles,
• San Diego,
• Mexicali,
• Tijuana,
• Ventura Basin,
• Fillmore,
• Southern San Joaquin Valley,
• Catalina Island,
• Ensenada
• 600 x 300 x 80 km

Slide Courtesy Marcio Faerman
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TeraShake Earthquake Simulation

• Magnitude 7.7 earthquake on southern San Andreas
• Mesh of 1.8 Billion cubes, 200 m
• 0.011 sec time step, 20,000 time steps 3 minute
  simulation
• 240 processors on San Diego SuperComputer Center
  DataStar
• 20,000 CPU hours, over approximately 5 days
  wall clock
• 47 million megabytes of output
• Asynchronous rendering of simulation output
  during ongoing computation

Slide Courtesy Marcio Faerman
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About Data
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Go! Visualize

• Velocity components
• (Volumes and Surfaces)

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Visualize ?what?

• Velocity within specific range
• Color ramps easily understood by scientists.

250.0                              250.0
cm/s
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Visualize ?what?

• Context Geographic location
• Context Fault lines
• Simulation Time

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Visualize ?what?

• Velocity components and magnitudes
• Velocity Cumulative peaks
• Velocity range and color schema

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Tangible Numbers

• 55 Different animations
• Over 80,000 images
• Above 14,000 CPU hours on Datastar
• Above 12,000 CPU hours on Teragrid
• 2d Surface, 3d Topography and volume rendering
  techniques

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One of the Surface Viz

• Movie Clip

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One of the Volume Viz

• Movie Clip

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Current Viz Effort

• Wave propagation in 3d
• Topography with wave propagation
• Movie Clip

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Tools we use

• Vista (SDSC/NPACI) Batch Volume renderer
• Mesh Viewer (SDSC/NPACI) Interactive Volume
  Renderer
• Aliass Maya Image Studio
• Adobes suite (After Effects, Photoshop,
  Illustrator)
• Other things that work

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Does Visualization help?

• Diagnosis, monitoring and verification
• Identification of fairly simple aggregate
  behavior of the phenomenon (wavefields) that
  could not be guessed at by simply examining
  standard output
• Integrate disparate data
• Makes the results palatable to broader audience

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• Thanks for your patience!

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• ? - ?
• Website to visit
• http//visservices.sdsc.edu/
• Drop a line to amit_at_sdsc.edu