I don't see what's the big deal about it being picked up in Oklahoma is.
Hobbyists with a few hundred or a few thousand dollars worth of equipment can build their own seismometer that will pretty much pick up any Magnitude 6+ quake in the world.
Not even THAT much money:
http://www.google.com/search?hl=en&lr=&q=homebrew+seismometer+&btnG=Search
I don't know anything about this particular publication, but the usual deal is that 'journalists' never do any real homework, never get anything right, but are unshakeably convinced that they're better informed than the rest of us.
If I were even mildy curious about something of this sort, I'd have a better degree of perspective than they usually do in fifteen minutes of mining the net.
I detest what passes for 'journalism' these days.