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.
In 1986, the Hubbard Glacier in Alaska surged at the rate of 10 meters per day for several months! Friction at the base of a glacier causes the underside to move more slowly than the top. Rapid movement of a glacier causes stresses to build up in the ice, forming cracks, called crevasses, at the glacierâs surface. Crevasses may be small or quite large, and they pose a real hazard to anyone moving about on a glacier.