Today and yesterday, Orange County residents within 50 miles of Camp Pendleton might be feeling some shaking sensations, but they won't be an earthquake (well, unless an earthquake actually happens). “F-18s will be dropping up to 500 pounds of high explosive munitions into the Whiskey and Zulu impact areas," an advisory from the marine base says. Additionally, other units will be mortar live firing of high explosive munitions from 6 a.m. to midnight. “Depending on atmospheric conditions, the sound of the explosions may be amplified and heard up to 50 miles away.” more ›