Why was the San Francisco earthquake was important?

It led to geological studies that have proven that the Andreas fault line is certain to cause periodic earthquakes such as the one in San Francisco in 1989. What it did was cause architects and engineers to build buildings that can withstand certain levels of earthquakes. Earth movements in California are common. No major earthquakes have happened in the last few decades. However, as in 1906, the earth has demonstrated that havoc can happen at any time in the future.