Why do the areas of earthquakes with most risk are close together instead of spread out?

Areas with the highest earthquake risk are often close together due to tectonic plate boundaries, where plates interact—colliding, sliding past each other, or pulling apart. These interactions create stress in the Earth's crust, leading to seismic activity. Regions near these active boundaries, such as the Pacific Ring of Fire, experience frequent earthquakes, resulting in clusters of high-risk areas. Additionally, geological features like fault lines can concentrate seismic events in specific regions rather than spreading them out.