No, it wasn’t an earthquake that hit South Jersey on Saturday morning..it was a sonic boom over the ocean. A military aircraft that was flying over the water near South Jersey caused a sonic boom Saturday, just after 11am. The boom was felt all over South Jersey, from Buena down to parts of Cape May County. The ground shook for a few seconds, and it was gone. The military is not saying where the sonic boom was created. Social media sites like Facebook exploded with word of the ground shaking on Saturday.