Week 3

June 25th, 2010

This past week was far slower than the last.  I've been practicing phase velocity measurements on Rayleigh wave data to get acquainted with the programs/method.  Meanwhile, Gabi has been busy putting the final touches on the programs needed for inverse modeling of the PLUME love wave data.  Yesterday she showed me how to make synthetic models of Rayleigh wave data, similar to the forward modeling I did last week.  In this process I call a program to produce a synthetic model from a "tweaked" grid (i.e. I pick where and how large an anomaly should be).  From this model the program calculates dispersion curves which I further invert at the 24 iteration.  Another program allows me to play around with the tradeoff between the model roughness and X2, looking at iterations from 1-40.  I can also look at how frequency effects the "accuracy" of the velocity model.  Overall this process will give us a better idea of what quality of data to expect as proceed with the true data inversions.  Next week I should be able to continue the synthetic modeling on love waves and then move on into actual inversions the following week. 

The world cup has dominated my free time/lunch break.  I'm either at the pub, at the brewery or sleeping.  It's a great life