Please forgive my title (lol), just bringing a little humor to the unfortunate realization that my blog has been pretty much neglected for the second half of the summer. I assure you that my blogging activity is not a reflection of my work; I have a few presentations and a research paper in the works that can attest to that!
Picking up where I've left off, we were able to run the cross correlation on a full month of data. In the process, I've experimented with different filters for data, tested different thresholds for event inclusion, and completely dismantled and re-vamped a map of my study region. As far as result go, for the month of data that I've dealt with, I've generated catalogs with 9 times, 6 times, and 5 times more events than listed in previous catalogs. The number of detections vary with the mean absolute deviation threshold chosen. As you increase the threshold that events must have to be included into catalogs, the accuracy of detecting true earthquake events increases, which in turn, decreases the actual number of events. Enhancing the earthquake record of the region in such a way brings light to a trend of increasing earthquake occurence rate that could not be seen with the initial catalog!
My next step was supposed to be to correlate the sudden trend with instances of hydrofracking in the area... That didn't go well. We ran into difficulties acquiring daily injection data that would have tremendously helped the cause. Given the scope of my research, most injection records were too broad for my use, covering months and years, instead of days in a single month. Just a slight setback. We are currently looking for other ways and sources to access this information from.
I've read and discussed quite a few papers with the seismology group here at Georgia Tech, but by actually conducting research myself, I've gained a whole new level of respect and admiration for the individuals whose time and hard work goes into projects such as these. The interns and grad students I've gotten the chance to work with have been amazing, and my mentor has been great source of knowledge and advice. Though I'm physically leaving Georgia Tech today, I will be sure to keep in contact with the people I've met. While I'm sure that my research will extend into the upcoming semester, I think there's a beach in my nearer (excuse my poor grammar) future!
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