Reuters reports that California will be struck by a major earthquake within the next 30 years scientists said.
The grim geological forecast comes from data analyzed in a new study that judges earthquake possibilities across the state.
The report finds that there is better than a 99 percent chance for an earthquake measuring 6.7 magnitude or higher.
The chances of a 7.5 magnitude quake happening in southern California are greater than in northern California, 37 percent versus 15 percent the Assoctiated Press reports.
Scientists cannot predict for sure where in the state the earthquake will happen but knowing one will helps.
The data should be "a wake-up call for residents to prepare for a natural disaster in earthquake country."
This is the first time the U.S. Geological Survey (USGS), Southern California Earthquake Center (SCEC), and California Geological Survey have collaborated to make a geological prediction.