Hanging Wall Faults

When the hanging wall moves horizontally it s a strike slipearthquake.
Hanging wall faults. You probably noticed that the blocks that move on either side of a reverse or normal fault slide up. Moving the hanging wall up an inclined fault requires work to overcome friction on the fault and the downward pull of gravity. Strike slip faults have a different type of movement than normal and reverse faults. When movement along a fault is the reverse of what you would expect with normal gravity we call them reverse faults.
In fault fault plane is called the hanging wall or headwall. Its strike and its dip. Occurs where the hanging wall moves up or is thrust over the foot wall. The block below is called the footwall.
It is a flat surface that may be vertical or sloping. This type of faulting is common in areas of compression when the dip angle is shallow a reverse fault is often described as a thrust fault. An upthrown block between two normal faults dipping away from each other is a horst. Low angle normal faults with regional tectonic significance may be designated detachment faults.
The fault strike is the direction of the line of intersection between the fault plane and earth s surface. A downthrown block between two normal faults dipping towards each other is a graben. When the fault plane is vertical there is no hanging wall or footwall. In a normal fault the hanging wall moves downward relative to the footwall.
Any fault plane can be completely described with two measurements. The dip of a fault plane is its angle of inclination measured from the horizontal. If the hanging wall moves to the left the earthquake is called right lateral if it moves to the right it s called a left lateral fault. The hanging wall will slide upwards right.
Occurs when the hanging wall moves down relative to the foot wall reverse fault.