Stephanie Spear 
There have been several earthquakes in New Jersey this summer. Whether you felt it or not, this seismic activity has been happening right under our feet. Most recently, a magnitude 2.7 earthquake was felt in parts of Bergen County on Tuesday, August 5th, originating near Hillsdale. Read on for more about the summer of shakes in New Jersey.
Summer of Quakes
A 1.6 magnitude quake was reported in Morris County on July 21st, 2025 near Randolph. Five aftershocks were felt on July 21st and 22nd in the surrounding areas. No damage was reported.
Read More: 2.4 Magnitude Earthquake Felt in Bergen County, New Jersey Friday Afternoon
On August 3rd, 2025, another earthquake was reported. This one was a 3.0 magnitude and it originated in Hasbrouck Heights. This quake was felt by residents throughout Northern New Jersey and New York City.
Another quake was reported on August 5th, 2025. Per the US Geological Survey, it was a magnitude 2.7 earthquake originating near Hillsdale, New Jersey. Most likely, this is an aftershock related to the August 3rd event.
What’s Happening?
Northern New Jersey is the location of the Ramapo Fault, a geological fault line that stretches over 180 miles long from New York through New Jersey to Pennsylvania. A fault is a fracture between two rocks, and movement between the rocks is what causes an earthquake.
According to researchers from Columbia University, “Earthquake epicenters in the region [Northern New Jersey + New York], although scattered, generally follow a southwest-to-northeast trend from eastern Pennsylvania, through New Jersey, and into the Hudson Highlands in Rockland, Westchester and Putnam Counties. Although the epicenters are scattered, the seismicity patterns appear to be concentrated along several geologic features, including the Ramapo Fault System.”
Scientists aren’t certain if each of the three summer quakes is connected to the Ramapo Fault yet. An April 2024 earthquake lead to the discovery of a new fault in New Jersey, called the Mountainview Fault.
The New Jersey Office of Emergency Management has information on how to prepare for an earthquake and how to stay safe after.
See More: 20 Montclair Area News Stories This Week
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