The one on the border is getting very interesting. BTW there is no drilling or fracking in that area. I spend a lot of time around there mining and hunting.
Is it possible that magma might be creeping up to the surface?
The quakes may be because of the Nemaha Ridge.
(from wiki description)
The Nemaha Ridge is located in the Central United States. It is a buried structural zone associated with a granite high in the Pre-Cambrian basement that extends from approximately Omaha, Nebraska to Oklahoma City, Oklahoma. The ridge is associated with the seismically active Humboldt Fault zone. The ridge is associated with the Proterozoic Midcontinent Rift System which extends into northern Kansas about fifty miles west of the Nemaha Ridge.[1] The long term uplift along the ridge has been attributed to isostatic uplift due to the anomalously thick crust adjacent to the Midcontinent Rift.[2]