This week has primarily consisted of article reading and a little data analysis. I’ve been doing quite a bit of reading about the SAF because it has been so heavily studied. I now have a better understanding of what tremor is and different ways to locate it, and I’ll be applying much of what has been done in studies on the SAF to the NAF.
Here’s a little of what I’ve learned about tremor this past week:
With that in mind, I located 57 earthquakes that have occurred in or near Turkey since June 2005. IRIS had a temporary network set up for about 3 years, and I have been downloading data from specific events. I have looked at data from 9 different earthquakes thus far. Once I have the data, I use SAC (a program within UNIX) to filter the seismograms. I have been filtering the data from 2-8 Hz (these values are based on what I have seen in the literature). I’ve included two figures to help visualize everything. There was an earthquake in western Turkey on October 18. The first figure is the unfiltered, transverse data collected by five different stations, and the second consists of the same stations with the 2-8 Hz filter. My advisor is out of town until next week, so I’ll hopefully be able to provide some further insight next week!
I have been pleasantly surprised by how much easier the programming has gotten for me by this point. I feel much more comfortable with navigating my way through SAC and am able to figure out minor problems on my own. I’m definitely not even close to being an expert, but this has definitely been a huge relief for me. That's all for now!
Figure 1. Unfiltered seismogram
Figure 2. Filtered seismogram 2-8 Hz
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