Is the East Coast on the brink of a major earthquake — and are we prepared?

The earthquake that struck the East Coast earlier this month was felt by an estimated 42 million people and luckily caused little damage, but what are the chances of a bigger, more powerful quake striking the area? And if it does, what could it look like — and are we prepared?

The April 5 phenomenon was a 4.8 magnitude earthquake centered near Whitehouse Station in New Jersey, which is about 40 miles west of New York City.

Shaking was felt from Washington D.C. to Maine, according to the U.S. Geological Survey (USGS), and it followed a much smaller, 1.7 magnitude earthquake in New York City on Jan. 2. 

Earthquakes are rare along the East Coast, with the most powerful one in the last 100 years hitting in August 2011, clocking 5.8 on the Richter scale. It was centered in Virgin...