I saw this for the first time in 1970. It had been broadcast on the BBC and then the San Francisco PBS station because it had such an impact on the local area. I watched in fascination as the streets and buildings of San Francisco that I knew were shown. What really hit me was them saying that Adams Jr. High School was built right on top of the San Andreas earthquake fault. My sister was going to Adams Jr High at the time! I checked. The school wasn't shut down until 2009, and then only because of a budget shortfall.
Yes, it is very dated but it is fascinating because of its age. It documents the early history of everything from fracking caused earthquakes to a very period intro with music and motorcycles you have to see to appreciate.