Week Seven

August 2nd, 2010

This week was pretty productive.  I ran the second cross correlation script I had written, and came up with relative arrival times for different tremor events.  We ended up using a detection threshold, cutting down the results to the top 488 events for me to focus on.  My next job was then to group similar events together into families.  If a certain segment matched more than one time period, or a time period matched more than one segment, those were grouped into families.  As a first pass, I came up with around 180 families for each station.  Looking back at the data though, I realized that some events may have been counted more than once.  The event may have been counted twice if both the segment and the time period were off by a half second compared to a different event.  Taking this into consideration, I'm writing a script to eliminate these possible repeats.  Elizabeth and I decided on three seconds as a cutoff for whether or not something is a repeat.  If both the segment and the time period fall into that three second region, they're going to be considered a repeat and not counted.  We can always modify it, but as a first pass this is what we thought would work.  

Our field day went well, we got all the stations installed, but it was a little rough.  Working in teams of three or four we installed ten stations (five for each team).  The main problem was that the road to get there had been washed out, so we had to carry the batteries over ridges to where the stations were going to be located.  It took us around six hours to complete all the stations, and afterwards we were all dead tired.  It was nice to get to work in the field again though, and I enjoyed being able to set up stations, which I hadn't done since our orientation week.

Next week is the last week, and I feel like I still have so much to do!  Hopefully everything gets done, and I have a respectable poster to present.