Geophysicists play a crucial role in studying and predicting earthquakes by analyzing seismic activity, studying the Earth's structure, and using various technologies to monitor and detect changes in the Earth's crust. They collect and analyze data to better understand fault lines, stress patterns, and other factors that contribute to seismic events. By studying these factors, geophysicists can help predict where and when earthquakes may occur, which can ultimately help in mitigation and preparedness efforts to minimize the impact of these natural disasters.