Did you feel that shake? If you’re anywhere near the East Coast, chances are you did. Around 1:50 p.m. today, a 5.9 earthquake shook the Eastern U.S. from North Carolina all the way up to Martha’s Vineyard and as far west as Michigan. The quake hit about 40 miles northwest of Richmond, Virginia, and shakes were felt all across the East Coast. While an East Coast earthquake is unusual, and certainly rattled us, we shouldn’t be too surprised. Back in March, a group of seismologists at Columbia University’s Lamont-Doherty Earth Observatory said that an earthquake of at least 5.0 magnitude rocks New York City at least once every 100 years. The last one hit in 1884, meaning that today’s quake was a bit overdue.