Saturday, February 19, 2011
Arkansas Earthquake Swarm Starts to Tail Off
That's a joke! Actually, I just didn't get in today's report. After all this time, they still can't plot the injection wells, or the time histories of injection. Sheesh! I think China does a better job....
Also top secret is what the heck they are injecting. I know they use a toxic witch's brew of chemicals, and I can't see if it makes any difference. But what we have here is a classic little New Madrid baby starting to grow up. Note the long tail going parallel to the NM tails, with the cross-cutting thrust section. If they could get fault-plane solutions (beachballs), we would see an exact baby New Madrid.
If I were guessing the injection point, it would be at the vertex of the 'checkmark'. Happy earthquakes, people!