LAKE MARY, Fla. - The United States Geological Survey (USGS) reported a magnitude 3.9 "experimental explosion" approximately 187 miles east-northeast of Flagler Beach, Florida.The shock, detected on Friday afternoon, is near a location where the United States Navy conducted tests last month.On June 18, the Navy reported that its aircraft, the USS Gerald R.
Ford, successfully completed a scheduled explosive event on the U.S. east coast as part of Full Ship Shock Trials. That event also measured a magnitude 3.9 shock. RELATED: USGS reports 3.9 magnitude 'experimental explosion' off Florida coastWhile the Navy has not released an official statement, Stars and Stripes is reporting that it is the same shock trial testing on Friday.