Lecture 14 - Lecture14 25/03/200808:19:00 EarthsInterior...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 14 25/03/2008 08:19:00 Earth’s Interior Seismic Waves o Travel at different velocities, velocity depends on… Density and Elasticity of medium They increase with depth P waves travel through solids and liquid, S waves travel through  solids but not liquids P waves are always faster than S waves Reflection o The wave travels and increases velocity with depth until it reaches a  different medium, then it will reflect. Refraction o But not all of the energy reflects, some refracts and goes through into  that new surface but bent and at an angle towards the surface.  If  going from Low velocity layer to high, it refracts towards the axis, if  going from high to low it refracts away from the axis. o Refracted waves will eventually get to the point fastest over a longer  distance, and a reflected wave fastest over a shorter distance. Crust
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

Lecture 14 - Lecture14 25/03/200808:19:00 EarthsInterior...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online