San Andreas Fault: 93% Chance of M7.0+ Quake in California by 2045 — Is State Ready for Big One?

A photo of the Carrizo Plain in California where surface fractures of the San Andreas Fault can be seen (Credit: NASA Terra spacecraft/nasa.gov)

A major seismic forecast has renewed concern over earthquake risk in California, with scientists estimating a 93% probability that at least one magnitude 7.0 or higher earthquake will strike the state by 2045.

The projection, based on long-term rupture models across multiple fault systems including the San Andreas Fault, raises urgent questions about whether infrastructure and emergency planning are sufficient to withstand a major event affecting millions of residents.