Tectonic shear stress.
It is a THRUST fault The San Andreas Fault
It's a transform boundary between two plates. The resultant fault of a transform boundary.
The type of stress responsible for each fault ( Normal, Reverse, Sinistral, And Dextral) is shear. These four types of fault all are apart or not connected. Shear is also a way to say apart or not connected because you are pulling two things apart so they are separated. The same thing goes for the fault this is why the answer is shear.
The Hayward Fault is a Strike-slip Fault.
Tectonic shear stress.
Strike-slip Faults
Yes, in a strike-slip fault, the fractures are caused by horizontal shear stress. This type of fault occurs when two blocks of rock slide past each other horizontally. Examples of strike-slip faults include the San Andreas Fault in California.
Strike-Slip fault is the most common fault type in the San Andreas fault system.
It is a THRUST fault The San Andreas Fault
The fault shown in the image is most likely caused by compressional stress, where tectonic plates move towards each other. This can result in the formation of reverse faults, where the hanging wall moves up relative to the footwall.
The 1906 San Francisco earthquake was caused by the movement of the North American Plate sliding past the Pacific Plate along the San Andreas Fault, resulting in intense horizontal shear stress that built up and released suddenly.
THRUST
When shear stress exceeds the shear strength of a material, it can cause the material to deform or fracture. This type of fault is often associated with strike-slip earthquakes, where two tectonic plates slide past each other horizontally. The most famous example of this type of fault is the San Andreas Fault in California.
Transform Boundary
The Chilean earthquake was caused by subduction zone stress, where the Nazca Plate slid beneath the South American Plate. The fault associated with this event was a megathrust fault, specifically the interface between the two plates.
The San Andreas fault zone is located at a transform boundary, where two plates are grinding past one another horizontally. As the rocks grind past one another, shear stress causes rock to break into a series of blocks. The blocks form a series of strike-slip faults—the typical fault type along the San Andreas fault.