Geophysics of the Western United States:
Seismic Tomography: 3D displays and details revealed by animations
3D displays and animated views of seismic tomography models
Interpretation of models from 3D displays and details revealed by animations
Oblique view of the DNA09 model, with vertical cross section and isosurfaces. Vertical exaggeration is close to 1:1.
The blue isosurface near the west end is the S1 anomaly (high Vp), the west red isosurface is the S1a anomaly (low Vp),
and the east red isosurface is the Yellowstone-Eastern Snake River Plain anomaly (low Vp).
The bottom of the cross section is at 1000 km depth. Note that S1 reaches 1000 km.
Click for full size in new window.Introduction
High detail body-wave tomography models of Earth structure in the western U.S. (lower 48 states) have been determined in the past 2 years. Seismic data from EarthScope and the USArray Transportable Array have provided signals in a much closer spaced array than has been available previously over such a large area.
Seeing the detailed structure in these models is aided by 3D views and animations. The best way to explore the data to see all the details is with an interactive data viewer such as the IDV or Fledermaus. Displays shown here were made with the IDV.
The models used here are detailed in Seismic Tomography models
Contributions of new data, displays, and interpretations are welcome. Send email to the address here. Please include your name, position and institution.
3D displays and Animated Views of Seismic Tomography models
Western US
Animated vertical cross-section from south to north latitude.
Vertical exaggeration is approximately to 1:1. Steps at 0.5 degree or 1.0 degree latitudes.DNA09 Vp animated gif (4.8 MB) DNA09 Vp Quicktime movie (5.5 MB)
MITP 2010 animated gif (10 MB) MITP 2010 Quicktime movie (5.5 MB)
Yellowstone National Park -- Eastern Snake River Plain Seismic Anomalies
Oblique 3D mapped view of DNA09 Vp anomalies in cross-section and as an isosurface seen from the south-east and southwest:
Oblique 3D mapped view of cross-section animation seen from the south-east. Vertical exaggeration is approximately 1:1.
DNA09 Vp anomalies animated gif DNA09 Vp anomalies `Quicktime movie
Oblique 3D mapped view of cross-section animation seen from the south-west. Vertical exaggeration is approximately 1:1.
DNA09 Vp anomalies animated gif DNA09 Vp anomalies `Quicktime movie
Oblique 3D mapped view of three cross-sections seen in animation, in rotation. 16 MB Vertical exaggeration is approximately 1:1.
DNA09 Vp anomalies animated gif DNA09 Vp anomalies `Quicktime movie
Anomalies S1 and S1a
1. Oblique 3D mapped view of animated north-south cross-section, and isosurfaces, seen from the east. Vertical exaggeration is approximately to 1:1.
Also shows the Great Basin, and the Colorado Plateau.DNA09 Vp anomalies animated gif DNA09 Vp anomalies `Quicktime movie
2. Oblique view of vertical cross section of model MITP 2010; blue region is anomaly S1; with S1 (high Vp) anomaly isosurfaces from models MITP 2010 and DNA09, seen from south.
Blue isosurfaces from model DNA09 and grey isosurfaces from MITP 2010. Vertical exaggeration is close to 1:1.
3. Map view of S1 (hi Vp, blue) and S1a (low Vp, orange) anomalies from DNA09, and location lines of the cross sections shown below. Vertical exaggeration is close to 1:1.
4. Vertical cross section of DNA09, and S1 anomaly (high Vp) isosurfaces, seen from south. Vertical exaggeration is close to 1:1.
5. Vertical cross section of MITP 2010, and S1 anomaly (high Vp) isosurfaces, seen from south. Vertical exaggeration is close to 1:1.
6. Vertical cross section of UO 09 VP, and S1 anomaly (high Vp) isosurfaces, seen from south. Vertical exaggeration is close to 1:1.
7. Vertical cross section of model DNA09, and S1a isosurfaces(low Vp, orange), see from south. Vertical exaggeration is close to 1:1.
98. Vertical cross section with anomalies S1a (low Vp, red) and S1 (high Vp, blue) in Vp from DNA09, from west. Vertical exaggeration is close to 1:1.
89. Vertical cross section with anomalies S1a (low Vp, red) and S1 (high Vp, blue) in Vp from DNA09, from east. Vertical exaggeration is close to 1:1.
6
Colorado Plateau
Oblique 3D mapped view of animated west-east cross-section, and isosurfaces, seen from the south. Vertical exaggeration is approximately 1:1.
DNA09 Vp anomalies animated gif DNA09 Vp anomalies `Quicktime movie
Seismic Tomography: Interpretation of 3D displays and details revealed by animations
October 13, 2010except where otherwise credited
Images Copyright © 2010 S. K. Wier
Reproduction, reuse, or retransmission prohibited without prior written permission from the author.
