GL101 Chapter 10: Chapter 10 - Earthquakes and the Earth's Interior.docx
Document Summary
Earthquakes and faults: movements that produce earthquakes are usually associated with large faults in earth"s crust, most of the motion along faults can be explained by plate tectonics theory, most earthquakes occur along faults associated with plate boundaries. Foreshocks and aftershocks: foreshocks: small earthquakes often precede a major earthquake by days or even by as much as several years, aftershocks: adjustments that follow a major earthquake often generate smaller earthquakes. Seismology: seismology: the study of earthquake waves, dates back almost 2000 years to the. Chinese: seismographs are instruments that record seismic waves, today"s instruments record the movement of earth in relation to a stationary mass on a rotating drum or magnetic tape. Types of seismic waves: waves that are generated by the slippage of rock mass are divided into two categories: Body waves: waves that travel through earth"s interior (p and s waves) Surface waves: ( waves that travel along the outer part of the earth (l waves)
