Unlikely U.S. State Shaken by Over 200 Earthquakes in Just Three Months

By: Georgia | Published: Aug 03, 2024

Over the last three months, New Jersey has experienced an unusual surge in seismic activity, with more than 200 earthquakes recorded. 

This is highly unusual as the state is not typically known for such geological disturbances.

A Recent Tremor

The United States Geological Survey (USGS) detected a 2.2-magnitude earthquake early Wednesday morning at around 1:44 am ET. 

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A seismograph machine with a moving arm records seismic activity, showing multiple lines indicating the intensity and duration of an earthquake

Source: jjauthor/X

This quake followed several others, including a significant tremor in April, signaling a period of heightened seismic activity in the region.

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Continuing Aftershocks

The recent 2.2-magnitude event is part of a series of aftershocks following the 4.8-magnitude earthquake that occurred on April 5, affecting New York City’s skyline and beyond. 

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A vibrant sunset over the iconic New York City skyline, featuring prominent skyscrapers like the Empire State Building illuminated against an orange sky

Source: Timo Wagner/Unsplash

These aftershocks are a natural occurrence as the rocks underground adjust post a significant seismic event.

Public Reactions on Social Media

A New Jersey resident described their experience on social media platform X, formerly Twitter, stating, “Felt another earthquake at 1:45 am in New Jersey. Heard an explosion tsunami approaching the house, followed by my house rattling for 30 seconds.” 

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Nighttime view of the entrance to the New Jersey Turnpike, showing toll booths with neon signs and vehicles passing through

Source: Wikimedia Commons

This firsthand account reflects the tangible impact of the quakes on local residents.

Perception of Earthquakes

While many tremors have been recorded, not all are felt by the residents. 

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An aerial shot of Michigan Tech University's campus during autumn, displaying bright fall foliage around the red and brick buildings beside a river

Source: Wikimedia Commons

According to Michigan Tech University, earthquakes with a magnitude of 2.5 or less are typically imperceptible to people, although they occur with some frequency.

Potential for Damage

Earthquakes ranging from 2.5 to 5.4 in magnitude, while usually felt, generally do not cause significant damage.

Extensive damage to a modern building with collapsed walls and debris scattered around, following an earthquake, with personal belongings and furniture visible among the ruins

Source: Çağlar Oskay/Unsplash

However, those measuring between 5.5 and 6.0 can result in structural damage to buildings and other infrastructure.

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Frequency of Aftershocks

The USGS notes that aftershocks “typically become less frequent with time, although they can continue for days, week, months or even years for a very large mainshock.” 

A suspension bridge under an intense orange sky, likely due to atmospheric conditions, with no vehicles visible on the roadway

Source: Wikimedia Commons

This indicates a long-term impact that could affect the area intermittently for an extended period.

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Historical Context

New York Governor Kathy Hochul remarked on the April 5th earthquake, saying it was “one of the largest on the East Coast to occur in the last century.” 

Kathy Hochul speaking earnestly to the media with microphones from multiple outlets capturing her statements

Source: Wikimedia Commons

The statement puts the recent seismic events in a broader historical perspective, highlighting their significance.

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Widespread Impact

The tremors were not confined to New Jersey; reports came in from Baltimore, Philadelphia, Connecticut, and even near the Massachusetts-New Hampshire border. 

A sunset casts a warm glow over Baltimore's bustling waterfront, showcasing rows of buildings along the water's edge with boats docked beside vibrant city streets

Source: Wikimedia Commons

This demonstrates the extensive reach of the April quake, which lasted around 20 seconds.

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Captured Moments

Dramatic moments during the quakes have been captured and shared on social media.

The facade of Boonton Coffee Co., featuring a modern design with the company's name displayed prominently above the entrance on a clear day

Source: Visit_NJ/X

These include videos from residential areas and local businesses like Boonton Coffee, where customers were seen fleeing as the establishment shook.

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A Premonition Caught on Camera

A video from a New Jersey home captures a poignant moment.

A dog stands alert on a sofa in front of a window, looking out, in a moment captured just before an earthquake shakes the room

Source: ScooterCasterNY/X

It shows a dog suddenly sitting up, sensing danger just seconds before the room begins to shake violently and belongings topple over. 

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Understanding the Ramapo Fault

The epicenter in Tewksbury is located on the Ramapo Fault, a significant geological feature over 400 million years old stretching through New York, New Jersey, and Pennsylvania. 

A detailed geological map highlighting the Ramapo Fault line through New Jersey and surrounding states, color-coded to show different sections of the fault system

Source: Wikimedia Commons

Kenneth Miller, a professor at Rutgers University, explains, “[The system] reactivated 200 million years ago, causing about four miles of movement,” highlighting the potential for future seismic activity in the area.

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