CAMPPENDLETON (CNS) - Marine Corps aircraft units will drop 500 pounds  of high explosive bombs as part of training aboard CampPendleton Thursday,  base officials announced today.

The training will take place in the Zulu impact area, near the center of  NorthCounty base, from to Thursday, according to Camp  Pendleton's public affairs office.

During the training, loud booms may be heard up to 50 miles away.