An early Friday morning earthquake sent tremors through New Jersey, rocking the northeast corridor from Maryland to Massachusetts. According to the U.S. Geological Survey, the quake hit at 10:23 am with its epicenter recorded near Readington in Hunterdon County.

Early estimates show it was felt by some 42 million people along the East Coast who largely aren’t accustomed to this kind of event. The earthquake rattled large buildings, shook windows and cars for about 20 to 30 seconds. So far, only very minor damage has been reported and no injuries, as assessments are ongoing, officials said.

“I was in a building complex that was on the 35th floor, and it was definitely like a zero gravity moment,” said one Jersey City resident “I moved from California; I thought I was leaving the earthquakes behind,”

Gov. Phil Murphy took to social media to let residents know the state immediately activated the emergency operations center. Murphy also spoke with President Joe Biden briefing him on the incident as 911 centers across the state reported being inundated with calls. Globally, this level of earthquake isn’t uncommon, but it was enough to unnerve a lot of tough Jersey residents.

“My roommate was screaming, so I felt bad, and I was like, ‘What’s happening? It’s just the train,’” said Cristine Alvarez, a Newark Resident. “I was not expecting [this]. I thought earthquakes were like a California thing.”

Flights were temporarily grounded in and out of Newark Liberty Airport, PATCO suspended service to check the integrity of the line, and New Jersey Transit operated on delays while bridges were inspected. The Holland Tunnel was also closed to traffic for inspection. State Police Colonel Pat Callahan on Friday said commuters should rest easy.

“I think they should be confident in the inspections that have taken place so far,” Callahan said. “NJ Transit has been out there inspecting their lines and bridges. I’ve been on with Port Authority multiple times, aside from the AirTrain at Newark, which is delayed probably for another three or so hours.”

Greg Pope, a professor of Earth and Environmental studies at Montclair State University, broke down today’s event: “There might be some minor aftershocks, but probably things that most people won’t feel. To have something as strong or stronger would be really unusual and not likely at all.”