Last week I was a busy bee trying to read as many papers I could on T phases and seismology on mid ocean ridges. It was really interesting. I love learning about new environments I am not familiar with. I finished my little Proposal about for my project this summer. It was extremely helpful and allowed me to get my thoughts in order. I am really ready to buckle down and keep working!
I made some progress with the data set I am working on. The swarm of earthquakes were recorded by other instruments in the area including the Navy's Sound Surveillance System (SOSUS) and the 2 ocean bottom seismometers plus the 6 temporary onshore seismometers that are part of EarthScope's FlexArray. I spent last week locating the August 2008 swarm with coordinates that SOSUS and ANSS gave. The locations for each array did not agree with one another. The strike was relatively the same, but the the locations were offset vertically and horizontally from one another. This could be for various reasons. The next step would be to plot the earthquakes recorded from the COLZA network using the algorithm that I mention in my last post. I have not had much time to go back and play with the parameters.
I also have to finish up looking at the peak to peak magnitudes for the August 2008 event and seeing if I can assign a magnitude to the smaller earthquakes. If all works well, I can gather a b-value then.
My adviser told me that there was another earthquake swarm in October of 2008. This was a much smaller event, but happened in the same region as the larger August 2008 swarm. As it says in my summer description, the August 2008 swarm had 75 earthquakes recorded by onshore seismometers with the largest being a 5.9. This is a large number of earthquakes for a mid ocean ridge. In comparison the October 2008 swarm only had 1 recorded earthquake with onshore seismometers.
If I can define a function to estimate magnitudes for small earthquake using the August 2008 swarm then I can apply it to the October 2008 swarm. It will be interesting to see how the two events compare.
This past weekend was AWESOME! I went on a camping trip with the other COAS REU students to check out the Cascades. I saw so many amazing volcanoes this weekend! It was so exciting!!! I got to see Newberry (Including the Obsidian Flow), The 3 Sisters, Mt. Jefferson, Mt Hood, Mt Bachelor, Lava Butte, lots of cinder cones, and many other amazing volcanic features. It was AMAZING! I am a volcano lover though so of course I loved it. The adviser for the COAS REU is a geologist so he was able to tell us about the geology of region.
Now back to work. I hope everyone has a good week!
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