EOSC 110 Lecture Notes - Lecture 18: Subduction, Convergent Boundary
Document Summary
Stress at plate boundary rupture at boundary shaking of earth movement of sea floor tsunami debris throughout the pacific. Sudden release of elastic energy in response to a buildup of stress. This energy is released when stress is greater than the strength of the fault. Energy is released as: seismic waves, displacement along the fault, heat and other energy. Elastic materials build up elastic energy when they are strained. When there is too much strain, the rock will: deform or flow (plastic deformation, break or move along an existing fault (brittle deformation) A pre-existing fault is held stationary (locked) by friction. The elastic plate on either side of the locked fault are moving slowly relative to each other (mm to cms/year) The blocks are distorted as the (shear) stress builds up. Earthquake originates at a point (focus) where the two blocks begin to slide past each other.
