Book excerpt: The concept of earthquake prognostics, originally initiated in the 80s by a Berlin-based group of scientists and experts, has been further developed at international seminars. The 6th international seminar held in 1991 at the Japanese-German Center in Berlin has considerably contributed towards concretization and materialization of the earthquake prognostics strategy. Topics: General aspects: Earthquake prognostics - From fundamental research to practical measures of protection; A few comments on earthquake disaster precention; Earthquake sources processes; Earthquake hazard assessment; Risk analysis and evaluation; Measures of protection.