Compositional change of seismic event sequences in focal zones during preparation of strong earthquakes

Abstract

The change of the structure of seismic event sequences in focal area in preparation period of strong earthquakes has been studied. Findings show that weak earthquake clustering in time increases in earlier stage of forming of focal area. However, spatial clustering of seismic events rises at the latest stage.

Keywords

• seismicity structure
• focus of earthquake
• seismic regime
• earthquake forecast