Seismicity is the study of earthquake activity, including the measurement, analysis, and understanding of the occurrence, distribution, and characteristics of earthquakes. It involves the monitoring and interpretation of seismic waves to determine the location, depth, magnitude, and source of earthquakes. Seismicity research helps to improve earthquake forecasting, hazard assessment, and risk mitigation strategies. It also contributes to our understanding of the Earth's internal structure and processes, such as plate tectonics and fault dynamics.