Another aftershock rocked New Jersey Saturday morning, one of more than 130 smaller tremors following the April 5 earthquake that affected an estimated 42 million people. The aftershock’s epicenter was about three miles from Gladstone in Somerset County, according to the U.S. Geological Survey. The quake happened around 9:49 a.m., data shows. It was unclear Sunday if any towns in the area reported damage from the aftershock. The aftershock was about 10 miles from the epicenter of the original 4.8 magnitude earthquake, which was about 4.3 miles north of the Whitehouse Station section of Reading…