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Large Data Visualization of Seismic Data (TeraShake). Amit Chourasia Visualization Scientist Visualization Services Presented at: SDSC Booth at SC05 . movie. About Terashake. Large Scale Earthquake Simulation on Southern San Andreas 33 researchers, 8 Institutions

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Large data visualization of seismic data terashake

Large Data Visualization of Seismic Data (TeraShake)

Amit Chourasia

Visualization Scientist

Visualization Services

Presented at: SDSC Booth at SC05



About terashake
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


Terashake simulation area
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


Terashake earthquake simulation
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



Go visualize

-0.1+0.1

Go! Visualize

  • Velocity components

    (Volumes and Surfaces)


Visualize what

-50.0 +50.0 cm/s

Visualize ?what?

  • Velocity within specific range

  • Color ramps easily understood by scientists.

250.0 +250.0 cm/s


Visualize what1
Visualize ?what?

  • Context – Geographic location

  • Context – Fault lines

  • Simulation Time


Visualize what2

0.0 250.0 cm/s

-50.0 +50.0 cm/s

Visualize ?what?

  • Velocity components and magnitudes

  • Velocity Cumulative peaks

  • Velocity range and color schema


Tangible numbers
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




Current viz effort
Current Viz Effort

  • Wave propagation in 3d

  • Topography with wave propagation

  • Movie Clip


Tools we use
Tools we use

  • Vista (SDSC/NPACI) – Batch Volume renderer

  • Mesh Viewer (SDSC/NPACI) – Interactive Volume Renderer

  • Alias’s Maya & Image Studio

  • Adobe’s suite (After Effects, Photoshop, Illustrator)

  • Other things that work


Does visualization help
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



? -

Website to visit

http://visservices.sdsc.edu/

Drop a line to [email protected]


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