The thump thumping that keeps South Jersey folks up at night isn’t coming from under the bed. Residents living along a 20-mile stretch of riverfront towns from Burlington to Gloucester Counties have reported noise from what officials call “boom car” parties in Philadelphia on the weekends, usually from Saturday 11 p.m. until Sunday 5 a.m. Philadelphia police enforce the city’s noise ordinance, which includes quiet hours between 9 p.m. and 8 a.m. Those who violate city code face fines for a first-time offense between $100 and $300. Four or more offenses could cost $500 to $700. Yesterday, the Merchantville Police Department posted an advisory that the Philadelphia Police are aggressively addressing the "Boom Car" situation that is affecting the residents of New Jersey with the loud thumping noise. The lots in which the Boom Cars have been gathering have been locked down, The Philadelphia Police have also issued numerous citations to the offenders. If you hear the "thumping" coming from across the river, please contact The Philadelphia Police at (215) 686-3030