Oklahoma has been getting M2.5+ quakes for weeks, maybe months or years. The latest, a 3.4, is linked. I am curious whether these quakes are related to the man-induced fracturing required to get natural gas production from shales. The depth is set by location program, and is 5 km. It would be interesting to know the actual depth. Since there seem to be a bunch of these in the same area, NE from and not far from Oklahoma City, you would think that a local network would have been set up that could give precise locations including depth.

I looked at a map for 2008 drilling and it does not look like it covers the area of these quakes:
compare:
http://www.ogs.ou.edu/pdf/2008-DrillingHighlights.pdf
to:
http://geology.com/state-map/oklahoma.shtml
Oklahoma City seems to be in Oklahoma County.

Oklahoma is one of the 2 or 3 states that I have never passed through; the others are Alaska and probably Kentucky. HW and I hiked to Tennessee from North Carolina in Great Smoky Park.

If you heat with Natural gas, you are going to pay a lot less, probably for decades, than with oil. The price of natural gas has crashed because so much of it has been found in the last couple of years. Long-term contracts may make it take a while to see on your utility bill, however.

Chris

• Okalhoma quakes