The Seismological Society of America (SSA) was born in the aftershocks of the 1906 San Francisco earthquake, as engineers, mathematicians and geologists united to learn more about the devastating event. From these earliest days, SSA has been committed to the science of seismology and sharing research with the public to help build an earthquake-aware world. While the home base for our nonprofit organization remains in California, more than 40 percent of our 2,800 members live and work outside the U.S.
