A magnitude 2.7 earthquake struck near Hillsdale around noon on Tuesday, adding to a series of seismic events that have affected parts of New Jersey this year. Experts believe this tremor was likely an aftershock from the magnitude 3.0 earthquake that hit near Hasbrouck Heights on Saturday night. Earlier in January, a magnitude 2.4 earthquake was recorded near Paramus, showing that Bergen County and its surrounding areas continue to experience frequent seismic activity.
According to data from the United States Geological Survey (USGS), New Jersey has experienced 24 earthquakes so far in 2025. These events have occurred in three primary clusters: one centered in Bergen County, another near Randolph, and the third around Tewksbury. The cluster in Tewksbury is considered a continuation of aftershocks stemming from the magnitude 4.8 earthquake that shook the region in April of the previous year. Near Randolph, there was a particularly intense period of activity in July, where six quakes were recorded in just 24 hours, highlighting the unpredictable nature of seismic events in the area.
The USGS has also provided historical data showing how seismic activity in the region has fluctuated over recent years. In 2024, there were 234 earthquakes recorded, with the majority classified as aftershocks following the April magnitude 4.8 event. By contrast, there were no recorded earthquakes in 2023, three in 2022, one in 2021, and three in 2020. The data underscores that while earthquakes in the region are not always frequent, they can occur in intense bursts, often triggered by larger quakes that lead to subsequent aftershocks.
New Jersey’s geological makeup contributes to the way these quakes are experienced. The state’s bedrock is old and hard, which allows seismic waves to travel farther than in areas with softer geological compositions. This characteristic often means that even smaller earthquakes can be felt over a wide area, causing concern among residents even when the magnitude is low.
Seismologists explain that the recent quake near Hillsdale is part of a broader pattern of aftershocks that have persisted since the significant April 4.8 event. They also note that the NYC area has only recorded four earthquakes higher than magnitude 4.5, demonstrating that while strong quakes are rare, the potential for noticeable shaking remains. Meteorologists and seismology experts agree that residents may need to prepare for more aftershocks in the coming weeks as the earth continues to release built-up energy.
The likelihood of additional seismic events remains elevated, and over the next week or two, small to moderate aftershocks are expected to occur across New Jersey. Residents are urged to remain aware of these developments and to ensure that they are prepared for the possibility of further tremors. While the recent quakes have not caused significant damage, they serve as a reminder that seismic activity in the state, though not as frequent as in some regions, can still pose a risk.
With New Jersey adding to its tally of recorded earthquakes in 2025, the region continues to draw attention from scientists monitoring seismic patterns. Communities across Bergen County, Randolph, and Tewksbury will remain under close observation as experts work to understand how these clusters evolve and what they may indicate for future seismic activity. The recent events highlight the importance of awareness and preparedness, particularly in regions where earthquakes, while not always catastrophic, can strike without much warning.
