What is the approximate depth at which most of the world's earthquakes originate?
Q1. What is the approximate depth at which most of the world's earthquakes originate?
Answer: Less than 70 km (shallow focus)
Explanation: Approximately 75% of the world's earthquake energy is released by shallow-focus earthquakes originating less than 70 km below the surface. These shallow earthquakes tend to cause the most damage as seismic energy is released closer to populated areas.