Yes, there has long been the question asked, does size matter. And, I guess that all depends on who you ask. I will have to apologize and admit I'm
much to shy to weigh in on the issue.
Oh right, earthquakes. Yes, I'm not necessary concerned with size, err, magnitude. There are many other factors such as location, depth, and
frequency. This is why Muzzy and Puterman's work is so valuable. You can spot the trends in the graphs and visualize the thing all at once. After
awhile, all those numbers can blur what's really going on. But when you see a graph, or map, that shows a pattern, you can understand what the numbers
mean in many dimensions.
For example, I'm a little puzzled by what I am seeing on the USGS map. On the 30 day map, Oklahoma is not what it should be. Well, that would be if
you compare what happened in Arkansas to what is now happening in Oklahoma. In Arkansas, we learned the earthquakes due to injection were on a
trend-line that extended from Greenbrier to Guy. The state geologists explained that this was an ancient fault that may have been re-activated by the
injection. I guess that makes sense. Puterman made many graphs at that time and you could see the pattern. The pattern was very typical of a fault
that was moving.
So, what the heck is my problem with Oklahoma. I've noted the crack, or fault, or coincidental line of quakes that run from Southern Kansas, all the
way to Texas. Yes, it is a big fault I suppose. Trust me, I don't really believe there is a giant fault. But that doesn't say there isn't. Or won't
be.
Look at the 30 day of Oklahoma. Not all the earthquakes fall along a general trend. The newest quakes today were away from the center. And what can be
seen is not a line. It is a large area that is active. It is more of a rectangle, oblong. Pick your shape. Whatever it is, it's a zone about 250km
long, and 100km wide. Which means it's about as long as the New Madrid Seismic Zone. However, the New Madrid fault is a narrower trend. Much narrower.
Does this mean there is more than one fault in Oklahoma?
Or, is there something else happening?
Heck, I'm pretty sure there is something abnormal happening. And, I'll spare you my imagination. At the moment there is on one thing for sure. At
almost every epicenter, there is a well nearby.
Did you know that underneath some glaciers, there is a layer of super-cooled water that helps lubricate it's movement?
Cool.
I think water lubricates faults.
Water. I think we take it for granted. And underestimate it in every way possible.
edit on 31-12-2013 by ericblair4891 because: (no reason given)