Earthquake Fault information
IRIS 4 types of fault motion http://www.iris.edu/hq/programs/education_and_outreach/animations/2
NOAA Fault images http://www.iris.washington.edu/gifs/slides/faults/slideshow/
Wikipedia – Faults https://en.wikipedia.org/wiki/Fault_%28geology%29
Vocabulary: Dip-Slip fault, tensional fault, gravity fault, thrust fault, compressional fault, shearing, sinistral and lateral fault, fault zone, oblique fault, graben, horst, scarp, transform fault, thrust fault,
Normal Fault

Normal Fault
Normal Fault

Normal Fault
Reverse Fault

Reverse Fault
Normal Fault

Left Lateral Strike Slip/Sinistral Fault
Transform Boundary - Right Lateral Strike Slip/dextral Fault

Oblique Fault
Graben – block of rock that falls into a lower position between 2 normal faults
Horst – German for “heap”. A raised fault block bounded by normal faults or graben.

Graben
Scarp – the up thrown side of a fault. Where the block of earth has moved up exposing a fresh rock and soil face.

Transform faults can be distinguished from the typical strike-slip faults because the sense of movement is in the opposite direction (see illustration at right). A strike-slip fault is a simple offset, however, a transform fault is formed between two different plates, each moving away from the spreading center of a divergent plate boundary. When you look at the transform fault diagram below, imagine the double line as a divergent plate boundary and visualize which way the diverging plates would be moving. A smaller number of transform faults cut continental lithosphere. The most famous example of this is the San Andreas Fault Zone of western North
America. The San Andreas connects a divergent boundary in the Gulf of California with the
Cascadia subduction zone. Another example of a transform boundary on land is the Alpine
Fault of New Zealand.
Transform faults are locations of recurring earthquake activity and faulting. The earthquakes are usually shallow because they occur within and between plates that are not involved in subduction. Volcanic activity is normally not present because the typical magma sources of an upwelling convection current or a melting subducting plate are not present.