The fault where rocks on either side move past each other during an earthquake is called a strike-slip fault.

Here's why:

* Strike: This refers to the direction of the fault line, which is typically horizontal.

* Slip: This refers to the movement of the rocks along the fault line, which is predominantly horizontal.

Types of Strike-Slip Faults:

* Right-lateral: Rocks on the opposite side of the fault move to the right.

* Left-lateral: Rocks on the opposite side of the fault move to the left.

Famous Example:

The San Andreas Fault in California is a classic example of a right-lateral strike-slip fault.