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Science Tour - 3D/4D mapping of the San Andreas Fault Zone

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How is a 3D geologic model constructed? The most arduous task of data collection has already been conducted through decades of field work and the compiling of databases for integration into geographic information systems (GIS). 3D modeling software has also evolved over time, but it has only been in the recent decade that the computer systems and software capable of integrating data for manipulation have become available in affordable means for geologic research.

The map below is a satellite image of the southern San Francisco Bay region showing the location of major faults mapped in the San Francisco Bay region. Aerial photography and satellite imagery are primary sources of information for generating geologic maps. However, ground-based observations are essential to resolve questions and verify features observed in photographs or imagery.

Satellite image of the Southern San Francisco Bay region
Satellite image showing the surficial location of major faults in the southern San Francisco Bay area

Image source:
Geologic map of the southern San Francisco Bay region
Earthquakes in the southern San Francisco Bay region
Gravity map of the southern San Francisco Bay region
3D geologic model of the southern San Francisco Bay region
3D geologic model
Well data and geologic models Digital elevation model (DEM) of the southern San Francisco Bay region Magnetism map of the southern San Francisco Bay region

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