Kansas Geological Survey

Tim Evanson, flickr Creative Commons

The Kansas Geological Survey has determined there is a connection between oil and gas production and earthquakes.

Scientists who plan to measure the water levels in a western Kansas aquifer system this winter say they expect declines similar to those in recent years.

Kansas Geological Survey researchers last year found the groundwater levels in the High Plains Aquifer had dropped an average of 3.5 feet.

That's the second-largest single-year decline they had ever recorded, behind only the 4.25-foot drop measured the year prior.