Forces used for the strike-slip fault in Iran:

Strike-slip faults are characterized by the horizontal movement of the Earth's crust, where two blocks of the crust slide past each other. This movement is primarily caused by the shear stress acting on the fault plane. In the case of strike-slip faults in Iran, these forces are the result of tectonic interactions between the Arabian Plate and the Eurasian Plate.

The Arabian Plate is moving northward relative to the Eurasian Plate. When the accumulated stress exceeds the strength of rocks, the energy is released in the form of earthquakes along these fault lines. The forces at work for strike-slip faults, like those in Iran, include:

1. Tectonic Forces: The relative motion of the tectonic plates generates shear stress along the fault lines. 2. Frictional Resistance: This is the force that opposes the sliding movement along the fault. The amount of friction depends on the type of rock, the roughness of the fault surface, and the presence of fluids in the fault zone. 3. Elastic Rebound: The process in which energy is accumulated in the rock on both sides of the fault as the plates try to move, is stopped by the frictional resistance until the stress overcomes this friction, causing a sudden movement (rebound) along the fault.

These forces do not act in isolation; rather, they interact in complex ways to produce the motion experienced during an earthquake. Iran, being situated on the complex boundary zone of these converging plates, experiences significant seismic activity as a result of these forces.