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3D Earthquake Hypocentres

 

Flinders Ranges Earthquake Survey 2003–2005Quakes - Click to enlarge

A joint Geoscience Australia–DMITRE Mineral Resources Division (formerly part of PIRSA) survey from September 2003 to July 2005 used 18 seismographs (including some Australian National Seismic Imaging Resource (ANSIR) equipment) located in the North Mount Lofty and Flinders Ranges to detect earthquakes.

Over 500 earthquakes were located. Of these 289 better quality hypocentres were selected for display. Locations with large horizontal, vertical or origin time errors, or with large gap angles were removed. The remaining hypocentres are plotted with their location error ellipsoids (2σ) to demonstrate the possible location errors.

This is the first earthquake dataset for this area that is suitable for comparison of earthquakes with geology and topography in 3D.

Using the model

In order to increase its accessibility, the Earthquake Hypocentres 3D model has been converted to .pdf format, allowing for maximum portability and eliminating the need for the end user to purchase any specialised software.

The user can fully interact with the model using Adobe Acrobat’s 3D Toolbar (Note: the toolbar varies with the version of Acrobat Reader):

Adobe Acrobat 3D toolbar

1. Rotate
2. Spin
3. Pan
4. Zoom
5. Default view
6. Select view		  7. Toggle model tree
 8. Pause animation
 9. Use orthographic projection
10. Model render mode
11. Enable extra lighting
12. Background colour (disabled if a gradient background is being used)

Software Information
The models can be viewed with Acrobat Reader 9 as it incorporates 3D visualisation capabilities. Acrobat Reader 9 can be downloaded free from the Adobe website.


Download the Flinders Ranges Earthquake Hypocentres 3D model (pdf 9.8Mb)

3D interactive model of Flinders Ranges Earthquake Hypocentres

Note: these models are presented as a 'proof of concept' only and their accuracy (spatial or otherwise) should not be relied upon for exploration or other decision making processes.