JFK is located in New York City and Newark is in the states of New York and New Jersey. New York State Governor Kathy Hochul announced that a security review should be conducted at airports to determine possible consequences after the earthquake.
On April 5, seismic activity was recorded in New Jersey, which turned into a 4.8 magnitude earthquake. Tremors were felt from Philadelphia to Boston to Manhattan, New York. The governor evaluated the earthquake as the most severe earthquake of the last 100 years.
Source: Ferra

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