WASHINGTON — Hundreds of thousands of people evacuated buildings across the East Coast on Tuesday after a moderate earthquake in Virginia that was also felt as far south as Chapel Hill, N.C. No tsunami warning was issued, but air and train traffic was disrupted across the East Coast.

In the Washington, D.C., area, parts of the Pentagon, White House and Capitol were among the areas evacuated. All memorials and monuments on the National Mall were evacuated and closed.

At the Pentagon, a low rumbling built and built to the point that the building was shaking. People ran into the corridors of the government's biggest building and as the shaking continued there were shouts of "Evacuate! Evacuate!"The quake even broke a water main inside the Pentagon, flooding parts of two floors, NBC reported.

Centered some 90 miles south of the nation's capital, the quake was a magnitude 5.9, the U.S. Geological Survey said.

Two nuclear reactors near the epicenter were taken offline as a precaution, officials said. No damage was reported at either.

At the U.S. Capitol, light fixtures swung and the building shook for about 15 seconds while the tremor hit, NBC News reported.

At Reagan National Airport outside Washington, ceiling tiles fell during a few seconds of shaking. All flights were briefly put on hold and one terminal was evacuated due to a gas smell.

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