1 / 38

SOEE2102 – Geophysical Field Trip and Tutorials

Explore geophysical field trip and tutorials at Malham Tarn (North Yorkshire) in October 2009, focusing on refraction analysis by Sebastian Rost from the University of Leeds. Learn about traveltime curves, peaceful nuclear explosions, seismic wavefield, raypaths, and more.

rsotomayor
Download Presentation

SOEE2102 – Geophysical Field Trip and Tutorials

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SOEE2102 – Geophysical Field Trip and Tutorials Malham Tarn (North Yorkshire) October 2009 Refraction Analysis Sebastian Rost University of Leeds 2009

  2. Traveltime Curves

  3. Traveltime Curves

  4. Traveltime Curves

  5. Peaceful Nuclear Explosions

  6. Traveltime Curves

  7. At criticaldistance: r = 90  ic = critical angle

  8. Seismic Wavefield and Seismic Raypaths Courtesy of M. Thorne (Univ. Utah)

  9. x Traveltimes Direct wave: (from velocity = distance / time )

  10. Refracted Wave: Snell’s Law

  11. Different ways to express the refracted traveltime curve Intercept time

  12. Crossover distance: Tdirect = Trefracted Xcross > 2z

  13. Intercept Times q1c q1 q2

  14. General multi-layer formula Layer thickness: z Layer velocity: V

  15. Up-Dip Q Down-Dip Q

  16. Combining Up-Dip and Down-Dip shoots with and Vd and Vu are apparent velocities!

  17. Field Experiment

  18. Shot point geometries 12 element geophone spread Possible shot point locations

  19. Off end reverse shot

  20. Sat On end Forward

  21. Sat On end reverse

  22. Traveltime picks (from Claritas)

  23. Traveltime Curves

More Related