Wichita Eagle: As oil drilling in Kansas has slowed since winter, so have the number and power of earthquakes emanating from Harper and Sumner counties.
Its no coincidence, say state geologists.
There were 67 earthquakes with a magnitude of at least 3.0 in the last year, including a 4.9 in November, according to the U.S. Geological Survey. Since April 1, there have been just 15 and none in July.
But the geologists remain cautious. They dont know, yet, how much of the decline in earthquakes is caused...