Ridgewood, NJ

A traffic spike was detected across northern New Jersey at 6:51 AM EDT on March 12, with spiking cells in Ridgewood, Randolph Township, and Hillsdale. The most likely source is ordnance testing at Picatinny Arsenal, a U.S. Army weapons research facility in Morris County adjacent to Randolph Township, which regularly conducts outdoor explosive testing that can be heard across the county and into neighboring Bergen County. Picatinny's normal testing hours are 8 AM to 4:30 PM on weekdays, though the 6:51 AM detection is slightly earlier than typical.