Question

At what depth do most earthquakes occur?

Answer 1

a really deep one... I'm pretty sure this was obvious.
jk less thank 80 km or 50 miles from the Earths surface

Answer 2

Most earthquakes occur at depths of less than 80 km (50 miles) from the Earth's surface. The San Andreas fault is NOT a single, continuous fault, but rather is actually a fault zone made up of many segments.