<P> Active faulting is considered to be a geologic hazard - one related to earthquakes as a cause . Effects of movement on an active fault include strong ground motion, surface faulting, tectonic deformation, landslides and rockfalls, liquefaction, tsunamis, and seiches . </P> <P> Quaternary faults are those active faults that have been recognized at the surface and which have evidence of movement in the past 1.6 million years - the duration of the Quaternary Period . </P> <P> Related geological disciplines for active - fault studies include geomorphology, seismology, reflection seismology, plate tectonics, geodetics and remote sensing, risk analysis, and others . </P> <P> Active faults tend to occur in the vicinity of tectonic plate boundaries, and active fault research has focused on these regions . Active faults tend to occur less within the area of any given plate . The fact that intraplate regions may also present seismic hazards has only recently been recognized . </P>

How do you identify the types of active faults