GEOL 100 Lecture Notes - Lecture 13: The Vibrations, Seismic Moment, Wasatch Fault
Document Summary
Earthquake: when tectonic stresses cause rocks to break, which moves energy outward in waves. This rapid release of energy causes the earth to shake. When there is motion along a newly formed fault. When there is motion on an existing fault. Displacement: the amount of movement during the offset or slip. Markers: things that reveal the amount of movement (like a fence on the. Focus: the exact location within the earth where the waves originate from. Epicenter: the exact point vertically above the focus (on the land) fault line) Elastic strain builds up and gets released when the rocks break. Creep: here is always slow, continuous movement along faults because of tectonic deformation. This energy radiates out in waves from the focus. Stick-slip behavior: faults initially move in jumps , quickly stop due to friction , and then build up and jump again. Slip: when the motion overwhelms the friction for another jump.
