A cluster of earthquakes rumbled through southern Kansas and northern Oklahoma in close proximity to each other early Monday morning.
Four occurred in a two-hour span ending shortly after 4 a.m., according to the U.S. Geological Survey. That came on the heels of a handful of quakes in the Medford, Okla., area on Sunday.
The strongest of the Monday morning quakes was a 4.1 on the Richter scale about nine miles east of Cherokee, Okla., at 4:20 a.m. That came less than a half-hour after a 3.9 temblor struck about seven miles east-northeast of Anthony in Harper County.
Only three minutes before the Harper County earthquake, another quake struck about seven miles south of Caldwell. It was measured at 2.7 on the Richter scale.
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No reports of damage have been linked to any of the quakes yet.