What are the different types of fault lines?
What are the different types of fault lines?
There are four types of faulting — normal, reverse, strike-slip, and oblique. A normal fault is one in which the rocks above the fault plane, or hanging wall, move down relative to the rocks below the fault plane, or footwall. A reverse fault is one in which the hanging wall moves up relative to the footwall.
What are the 3 types of fault motion?
There are three kinds of faults: strike-slip, normal and thrust (reverse) faults, said Nicholas van der Elst, a seismologist at Columbia University’s Lamont-Doherty Earth Observatory in Palisades, New York.
What are the 3 types of faults How do they occur?
There are three different types of faults: Normal, Reverse, and Transcurrent (Strike-Slip).
- Normal faults form when the hanging wall drops down.
- Reverse faults form when the hanging wall moves up.
- Transcurrent or Strike-slip faults have walls that move sideways, not up or down.
What are the 3 types of earthquakes?
Three Kinds of Earthquakes
- Shallow fault earthquakes. A fault is a break in the rock beneath our feet.
- Subduction zone earthquakes. The largest earthquakes ever recorded are subduction zone earthquakes.
- Deep earthquakes. Deep earthquakes occur in the subducting ocean slab, deep beneath the continental crust.
What is tensional stress?
Tensional stress is the stress that tends to pull something apart. It is the stress component perpendicular to a given surface, such as a fault plane, that results from forces applied perpendicular to the surface or from remote forces transmitted through the surrounding rock.
What fault has little up or down motion?
In a strike-slip fault (also known as a wrench fault, tear fault or transcurrent fault), the fault surface (plane) is usually near vertical, and the footwall moves laterally either left or right with very little vertical motion.
What is the longest lasting earthquake in history?
A devastating earthquake that rocked the Indonesian island of Sumatra in 1861 was long thought to be a sudden rupture on a previously quiescent fault.
