When it comes to earthquakes, researchers say the “big one” that’s due to take place in California could in fact be a lot bigger than anticipated — and a new analysis puts an estimate on some of the possible damage.

Scientists once believed the 800-mile-long San Andreas fault, which runs the length of the state where the Pacific and North American plates meet, could only rupture in sections.

But a 2014 study showed most of the fault could rupture at once, creating a rare 8.3-magnitude earthquake.

A new analysis by real-estate analytics firm CoreLogic estimates that in such an event as many as 3.5 million homes would be damaged, according to a Wall Street Journal report. The damage to homes could …