Six minor earthquakes shook one New Jersey county in a single day — rattling residents as the ground beneath them wouldn’t stay still. Morris County became the epicenter of hysteria Monday as the series of quakes — ranging from a magnitude 0.

Prior to Monday’s earthquakes, New Jersey had only two small tremors reported this year, including a 2.4 magnitude quake that jolted the northern New Jersey region near New York City. That quake was centered about 1 mile east-southeast of Paramus in Bergen County.

The 1.6 magnitude happened at 9:40 a.m. about two miles west of Morris Plains, and about three miles below ground, according to the U.S. Geological Survey.