I did a preliminary plot of the year 2009 data. And they are quite significant in my opinion. It looks like you missed what would probably have been obvious to someone who does this type of work for a living. I saw this on year plots I examined before but have not yet had time to study it in detail. The Year Charts and Archives Charts are there in part so that other people who do have the time can identify these types of things.

Briefly, if you look at the dates where the most powerful earthquakes occurred such as February 2, 2010 (8.8) and September 9, 2009 (8.1) you can see abrupt transitions in the line peak patterns around those times. That most likely means that something in one or more fault zones somewhere shifted strongly at that time. And that shows that the signals are responding to these tremendously powerful earthquakes. The next step then is to get the computer programs to point to the correct areas beforehand in cases where they are not already doing that.

When people do this type of work they need to look for important trends like that rather than only specific types of information such as exact longitude matches. And that is how important and productive research often gets done.