While it is true that California is located on the San Andreas Fault, and major earthquakes have occurred in the past, it is not possible to predict when the next "Big One" will happen. Earthquakes are complex natural events, and there are many factors involved in determining when and where they will occur. Scientists can study past earthquake data and use models to estimate probabilities of future earthquakes, but they cannot predict the exact time or location of a specific event. It is important to be prepared for earthquakes, regardless of when they might occur, and to follow safety guidelines in the event of an earthquake.