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The term strike-slip refers to a type of fault where two fault blocks slip in opposite directions of each other. Unlike a normal fault or reverse fault, strike-slip faults are vertical, or nearly vertical. When standing on one side of the fault and looking over to the other, if:

  1. the opposite block moves to the right it is known as right-lateral or dextral
  2. the opposite block moves to the left it is known as left-lateral or sinistral. [1]

Following is a video from Incorporated Research Institutions for Seismology (IRIS) that shows how a strike-slip fault moves:

Transform faults are a specific type of strike-slip faults that connect areas of seafloor spreading in oceanic plates. The horizontal movement along transform faults accommodates movement between two oceanic ridges or other tectonic boundaries. [2] Following is a another video from IRIS showing the placement of transform faults between mid-ocean ridges:

Notable Strike-Slip Faults and Their Most Recent Earthquakes

  1. San Andreas Fault (US) - 1905 San Francisco (M7.7 to M8.25)
  2. Denali Fault (US) - 2002 Denali (M7.9)
  3. North and East Anatolian Faults (Turkey) - 2010 Elâzığ (M6.1)
  4. Alpine Fault (New Zealand) - 2009 Fiordland (M7.4)
  5. Enriquillo-Plantain Garden Fault Zone (Hispaniola) - 2010 Haiti (M7.0)




  3. Whaley, J., 2017, Oil in the Heart of South America,], accessed November 15, 2021.
  4. Wiens, F., 1995, Phanerozoic Tectonics and Sedimentation of The Chaco Basin, Paraguay. Its Hydrocarbon Potential: Geoconsultores, 2-27, accessed November 15, 2021;
  5. Alfredo, Carlos, and Clebsch Kuhn. “The Geological Evolution of the Paraguayan Chaco.” TTU DSpace Home. Texas Tech University, August 1, 1991.