An earthquake that strong would be incredibly devastating. According to Live Science, "researchers estimate about 140 million people live within 60 miles of the fault."
Most of those people are in the eastern outskirts of Dhaka, Bangladesh. It wasn't long ago that the World Bank labeled Dhaka the fastest-growing city in the world. The problem is, the rapid development needed to keep up with growth isn't necessarily safe.
One of the researchers told Live Science: "I've seen them pumping sand to build up the ground level to build a 20-story building. If there’s an earthquake, [that ground is] going to liquefy and the building is just going to fall over."
Another researcher told National Geographic, "Dhaka's basically like building a city on a bowl of Jell-O."
The caveat here, and in lots of other earthquake studies, is it's really hard to predict when the fault may trigger a quake.
A seismologist in Dhaka told National Geographic they are preparing for an earthquake, though the process is slow.
This video includes images from Getty Images.