Are there any fault lines in northern California?
All of California is susceptible to earthquakes — it’s just that the most active and potentially most dangerous area is in Southern California along the San Andreas fault. See the attached link to the USGS seismicity map for California and you can see that earthquakes occur just about everywhere in California — and that map is only for those since 1990. The link to the seisimic hazards map shows the likelihood of a major earthquake in a specific area of California. As you can see on that map, the area least likely to have an earthquake is Central California — to the east of Sacramento. — added comment: You are much more likely to die in an auto accident or be struck by lightning than you are to die in an earthquake – even in California!
