ESS 101 Chapter Notes - Chapter 1: Outer Core, Melting Point, Geothermal Gradient

• School: UW
• Department: Earth and Space Sciences
• Course: ESS 101
• Professor: Swanson Terry

Document Summary

Compression/primary (p-waves) waves velocity 6-7 km/sec within the lithosphere (just (cid:396)e(cid:373)e(cid:373)(cid:271)e(cid:396) that they"(cid:396)e the fastest: propagates through all phases of matter can compress all three phases of matter. Velocity 3-4 km/sec (second fastest waves: only propagate through solid phases of matter you cannot shear through liquids or gasses because they have no rigidity/lattice structures, deformation of lattice structure as they move through the substance. Seismic waves refract because of velocity changes related to density changes within the earth seismic waves accelerate with increasing density. There is a p-wave shadow zone between 105 and 140 from the epicenter where there are no waves detected due to refraction at the outer core mantle boundary. S-wave shadow zone between 105 and 105 because the outer core absorbs the s-waves. These shadow zones can indicate the ea(cid:396)th(cid:395)uake"s epi(cid:272)e(cid:374)te(cid:396) P-waves are faster, so they arrive first.