The Big One: Is California 'overdue' for a devastating major earthquake? A near-certain disaster looms for California, but there are real things people can do to prepare.

The San Francisco quake killed an estimated 3,000 people and destroyed roughly 80% of the city. It is known as one of the deadliest in U.S. history.

In California, where the next “Big One” is an always-looming threat, some lessons learned from the 1925 Santa Barbara quake ...

California quakes: Don't wait for the big one.This is what to do before, during and after an earthquake. Less than two hours after the initial quake, some areas experienced 13 different ...

The last 'Big One' in California was a magnitude 7.9 quake that decimated San Francisco in 1906, killing 3,000 people and leveling 80 percent of the city's buildings.

A minor, 3.3-magnitude earthquake struck in Northern California on Monday, according to the United States Geological Survey.

However, the last "Big One", as a major tremor hitting California has been dubbed, occurred in 1906, when a 7.9-magnitude quake killed 3,000 people and levelled 80% of San Francisco's buildings.

That means that if the “Big One” were to strike today, an extra 14,350 residents, 22,500 structures, and 777 miles of roadway would fall within the post-earthquake floodplain.

The ominous truth: The Big One could happen any time, and there's more than one possible "Big One." "It's gonna happen. An earthquake could be in a matter of minutes, the next hour, tomorrow, or ...

The ominous truth: The Big One could happen any time, and there's more than one possible "Big One." "It's gonna happen. An earthquake could be in a matter of minutes, the next hour, tomorrow, or ...