After the main earthquake hit New Jersey, the USGS predicted there would be other aftershocks within the week, saying there would be a 50 percent chance of a magnitude three or higher. Depending on the size of the original quake, aftershocks can last for years and usually occur near the epicenter of the main shock.
The US Geological Survey (USGS) reported that people typically only feel earthquakes that have a magnitude 3.0 or higher but it also depends on the quakes' depth and location.
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