Master Sergeant Steven Conklin, spokesman for the 142nd Wing, said the military is authorized to fly supersonic 15 miles beyond the coastline, but pilots should not have the nose of the jet pointed toward the coast.The 142nd Wing in a Facebook post apologized for causing concern among coastal residents."During this training, we inadvertently went supersonic, and caused a sonic boom while pointed slightly toward the coastline while greater than 15 miles away from land," the 142nd Wing posted on Facebook. "We understand that this caused concern from our coastal residents and for that we sincerely apologize."