ERS103H5 Lecture Notes - Lecture 3: Seismology, Asthenosphere, Inge Lehmann
Document Summary
Has to do with the building up of energy within a focal point. The strain released during an earthquake is like the snapping of a bent stick. M 7. 1 - 5km ene of raboso, mexico. Occurred as the result of normal faulting at a depth of apx. The event is near the plate boundary between the cocos and north america. Cocos plate converges with north america at a rate of apx 76 mm/yr, in the northeast direction. The speed is dependent on the rigidity and density of the rock. Waves are refracted (bent) or reflected (returned) at boundaries. Two types of earthquake seismic waves: body waves and surface waves. Implies that pressure increases and rocks become more rigid at depth (because the earth is denser) Abrupt velocity changes are used to define changes in rock composition and define sections of the earth. Travel through all materials (like molten rock) Our earth is differentiated into different parts.
