Most of the Earth's earthquakes occur along tectonic plate boundaries. These boundaries are regions where the plates that make up the Earth's surface interact, leading to stress accumulation and release, which results in earthquakes. The most active zones include the Ring of Fire around the Pacific Ocean, transform faults like the San Andreas Fault in California, and convergent boundaries where plates collide. Regions along these boundaries often experience frequent seismic activity, making them hotspots for earthquakes and occasionally leading to significant geological events.