EAR 105 Study Guide - Final Guide: Hypocenter, Types Of Volcanic Eruptions, Plate Tectonics

• School: Syracuse University
• Department: Earth Sciences
• Course: EAR 105
• Professor: Junium

Document Summary

Plate tectonics bend the earth they break/ fracture at a vault (can fracture beneath the surface) cause vibration. Sudden motion along a newly formed crustal fault. *fault slip is the most common cause* Hypocenter (focus) the place where fault slip occurs. Earthquake waves expand outward from the hypocenter. Maps often portray the location of epicenters. Faults are like planar breaks in blocks of crust. Most faults have a slope (rarely, they can be vertical) On a sloping fault, crustal blocks are classified as: The fault type is based on relative block motion. The hanging wall moves down relative to the footwall. The hanging wall moves up relative to the footwall. The slope (dip) of fault is steep. The slope (dip) of fault surface is much less steep. Common fault type in compressional mountain belts. One block slides laterally past the other block. There is no vertical motion across the fault. The fault surface, however, is nearly vertical.