2. Seismic wave propagation

# 2. Seismic wave propagation - 2 Seismic Wave Propagation...

This preview shows pages 1–8. Sign up to view the full content.

2. Seismic Wave Propagation Kurt J. Marfurt CPSGG The University of Oklahoma 2-1 Introduction to Petroleum Geology and Geophysics

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

View Full Document
Learner Objectives After this section, you will be able to: Differentiate between P- and S-waves by their velocities and polarization Differentiate between body waves and various kinds of surface waves Derive Snell’s Law from Fermat’s principle of least time 2-2
Types of seismic waves 1. Body waves— pass through the interior of a body 2. Guided waves— are confined to a layer within or surface of a body Two vectors are needed to characterize each wave type: • A vector in the direction of propagation; • A vector in the direction of particle (or ground) motion. Ground motion can be displacement from a rest position, velocity (first derivative in time of displacement ), or acceleration (second derivative in time of displacement). Which one is measured depends on the type of geophone. 2-3

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

View Full Document
People wave 2-4 (http://www.kettering.edu/~drussell/demos.html)
Body Waves Compressional waves Particle motion is in the direction of propagation Compression and rarefaction occur at any point as a function of time Example of a compressional wave along a 1D elastic rod: 2-5 (Dobrin, 1988)

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

View Full Document
Compressional wave 2-6 (http://www.kettering.edu/~drussell/demos.html)
Compressioanl wave 2-7 (http://web.ics.purdue.edu/~braile/edumod/waves/WaveDemo.htm) P W a v e r t i c l M o n

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 29

2. Seismic wave propagation - 2 Seismic Wave Propagation...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online