Please consider using our free app AVO* instead of this app. It's much better. Seriously.
Elastic* is a simple rock physics calculator for petroleum geophysicists and engineers. Elastic* takes some basic acoustic parameters and gives elastic moduli. Quickly check your intuition or speculate about seismic response.
The tool is very simple. Just enter a density, at least one velocity value, and hit the Calculate button. If you only provide one velocity (Vp or Vs), and don't give a Vp:Vs ratio, the tool assumes a Vp:Vs ratio of 2.0. Conversely, if you provide velocities then anything you enter in Vp:Vs is ignored.
Updated the AVO* notice, because that app is now free
Added a button to visit the AVO* Market page any time
Updated links to the help pages, which are now at SubSurfWiki.org
Moved the RESET button to accommodate this