Timeline: The emergence of Isis. 1  1/40 2000 Abu Musab al-Zarqawi (pictured here) forms an al-Qaeda splinter group in Iraq, al-Qaâeda in Iraq. Its brutality from the beginning alienates Iraqis and many al-Qaeda leaders. 2  2/40 2006 Al-Zarqawi is killed in a U.S. strike.
Subduction zone earthquake. The area where the earthquake occurred is a subduction zone where the Pacific Plate is subducting beneath the North American Plate. The crust of southern Alaska was compressed and warped due to plate movement prior to the great earthquake after the plates locked together.Crustal plate movement.he area where the earthquake occurred is a subduction zone where the Pacific Plate is subducting beneath the North American Plate. The crust of southern Alaska was compressed and warped due to plate movement prior to the great earthquake after the plates locked together. Crustal plate movement.
If a plate with oceanic lithosphere meets another plate, the dense oceanic lithosphere dives beneath the other plate and sinks into the mantle: this process is called subduction. The sinking oceanic lithosphere drags the rest of the tectonic plate: this is the main cause of plate motion.