Residents in the northwest part of the valley say they heard a large boom that was followed by several seconds of shaking Monday afternoon.

Channel 8 Eyewitness News received calls from people in the areas of Summerlin Parkway and Lone Mountain, and 215 and Cheyenne.

We have checked with local police and fire departments. While they are not reporting anything out of the ordinary, they are investigating.

The U.S. Geological Survey didn't report any earthquakes.

Channel 8 Eyewitness News will have more information as soon as it becomes available.