Table of Contents for GEON IDV web site Introducing the GEON IDV GEON IDV: Data Displays & Analysis Capabilities     GPS Velocity Vectors & Error Elipses     Earthquake Locations and Magnitude     Earthquake Focal Mechanisms     Seismic Anisotropy     Seismic Tomography     REM Global Seismic Tomography Data     Mantle Models' Tomography     Topography Data and 3D Relief Maps     Yellowstone Geophysics Example     Particle Plume Dispersion     Earth Strain Imagery     Seismic Ray Paths     Tectonic Plate Motion Vectors     Earth Strain Axes Download & Run the GEON IDV How to Use the GEON IDV: Basics     More Tips "True 3D" with the GEON IDV Data Online: The GEON Portal, and the UNAVCO Catalog GEON IDV Data Formats and Access Methods NetCDF Data for the GEON IDV UNAVCO's ASCII to NetCDF Data Converters

Particle Plume Dispersion Time Animation in 3D

The IDV can display time-animation of particle dispersion in 3D displays. This is useful, for example, in tracking volcano ash cloud plumes. Add in a 3D topography relief plot for best results. The idea simply merges the IDV's point-data displays with its time animation controls.

Sample GEON IDV Quicktime movies of particles from St. Augustine volcano in Alaska are online at:

http://geon.unavco.org/unavco/AVO/StAugustine_synthetic_puff_oblique_topo_relief.mov 
http://geon.unavco.org/unavco/AVO/StAugustine_synthetic_puff_oblique_topo_relief_2.mov 
http://geon.unavco.org/unavco/AVO/StAugustine_synthetic_puff_oblique_topo_relief_3.mov *** maybe be best *** 
http://geon.unavco.org/unavco/AVO/StAugustine_synthetic_puff_oblique_topo_relief_4.mov 
http://geon.unavco.org/unavco/AVO/StAugustine_synthetic_puff_oblique_topo_relief_5.mov 
http://geon.unavco.org/unavco/AVO/StAugustine_synthetic_puff_overhead.mov 
http://geon.unavco.org/unavco/AVO/StAugustine_synthetic_puff_overhead_topo_image.mov 

For correct file format, see these sample NetCDF cdl and binary ".nc" files:
http://geon.unavco.org/unavco/AVO/volcano_plume.cdl
http://geon.unavco.org/unavco/AVO/volcano_plume.nc

Read more about NetCDF files.

Two views of the same two-cloud eruption, at the same time