The nation’s capital and surrounding areas were struck with an earthquake measuring 5.9 on the Richter scale just before 2 p.m. local time, on Tuesday, the U.S. Geological Survey announced. The epicenter was in Mineral, Va.

At approximately 1:50 p.m. local time, office buildings in Washington, D.C., began shaking, causing many employees to be evacuated shortly thereafter. After an hour of waiting outside, most employees were eventually allowed back in their office buildings.

“I was on the fourth floor of the U.S. Treasury Annex. I’ve spent a lot of time out in California, so this wasn’t that bad. But everybody (in the office) was freaking out. A lot of people didn’t know where to go or what to do,” said James Lund, an operations analyst.

Traffic lights are out in parts of the city, causing major traffic delays specifically along 14th street. Police are patrolling the area, to make sure people get to where they need to go.

All national monuments and parks in Washington are “stable but closed,” said United States Park Police spokesman Sgt. David Schlosser, according to CNN. Some minor damage has been reported, including part of the National Cathedral.

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