Miscellaneous notes (these may not display in your browser; look for the download arrow to get the pdfs)
Notes on volume change and moment tensors. These notes include excerpts from Tape and Tape (2013). We challenge the prevailing view that the isotropic component of a moment tensor is related to volume change in the source region.
Notes on the use of percentages in moment tensor decompositions. We do not use percentages ourselves.
Notes on measures of the CLVD fraction of a moment tensor (such as the epsilon parameter). We favor using lune longitude (gamma).
Notes on potency tensors. We do not use potency tensors ourselves.
Chapman-Leaney decompositions (pdf). This pdf is a set of notes we wrote regarding a 2012 GJI paper by Chapman and Leaney. Our notes were published as an online supplement of a 2014 GJI addendum paper by Chapman and Leaney. In our notes we use the lune in the context of general anisotropy to investigate the moment tensor decomposition proposed by Chapman and Leaney.
Start-up guide for plotting moment tensor source types on the eigenvalue lune
I have posted online some matlab scripts, GMT scripts, and mathematica scripts relevant for interpreting and plotting moment tensors. These files are available within the mtbeach repository on github. They can be downloaded from github as a zipped file or using git from the command line. Please email me with corrections or suggestions.
If you think you might use some of these concepts, here is a start-up guide:
Check out this pdf.
Download the mtbeach repository from github (git clone https://github.com/carltape/mtbeach.git )
Follow the setup instructions in the README file here
If you have Matlab installed, try one of the scripts to reproduce results in one of our published papers: TT2012kaganAppE.m, TT2013AppA.m, TT2015AppA.m These scripts use several functions that you may find useful.
If you have GMT installed, try out lune.pl
(Please email me if things do not work for you.)
Go here to see some example figures related to the papers above. Check out links to notes above.