A small earthquake rattled parts of northwestern New Jersey and eastern Pennsylvania Thursday morning.

According to the U.S. Geological Survey, the 2.1 magnitude quake occurred just before 7 a.m. in Milford, the same area where a smaller quake had occurred in August.

The earthquake was felt throughout most of Hunterdon County and in parts of Bucks and Northampton counties in Pennsylvania.

Roughly a dozen people reported that the tremor shook their houses, but didn’t cause any damage.

A 1.7 magnitude earthquake occurred in Milford on Aug. 19. No injuries or damage was reported in that earthquake.

No damage or injuries were reported in Thursday’s quake.