1. On the relation between codas in seismic reflection and transmission responses Kees Wapenaar Deyan Draganov Jan Thorbecke Delft University of Technology

2. Review for horizontally layered media Generalization for 3-D inhomogeneous media Conclusions

3. Constant Power-flux conservation: DU

4. Top:

5. Bottom: D=T, U=0

6. Constant Power-flux conservation:

7. In time domain:

8. (Claerbout, 1968)

9. In time domain: (Claerbout, 1968)

10. Transmission response Reflection response

11. Review for horizontally layered media Generalization for 3-D inhomogeneous media Conclusions

12. Claerbout’s conjecture: ‘‘By cross-correlating noise traces recorded at two locations on the surface, we can construct the wave field that would be recorded at one of the locations if there was a source at the other’’

13. Constant Power-flux conservation: DU

14. Power reciprocity: DBDB U A U B DADA DU Constant

15. Top:

18. Bottom:

19. Power reciprocity: Constant

22. In time-domain: i t

23. Syncline model

24. Transmission response (fixed, variable )

25. Causal part of

26. Directly modeled reflection response

27. i t

30. Transmission response observed at the surface from white noise sources in the subsurface

31. Simulated reflection response with coda 10 min long recording66 min long recording

32. Syncline model with reflector below the sources and its simulated reflection response ghost reflector

33. Syncline model with reflector below the sources and its simulated reflection response ghost reflector

34. Structural trends in the subsurface of the Netherlands, with recent sources of seismicity (white circles) and contours of constant depth of the Mohorovic discontinuity (Beekman and Stephenson).

35. 25% of antennas in central core High speed data transport Antenna cluster (Station) Central processor X Share infrastructure with synthetic radio-telescope

36. Combined monitoring the universe and the subsurface: Different applications; shared infrastructure

37. Shared infrastructure

38. Review for horizontally layered media Generalization for 3-D inhomogeneous media Conclusions

39. Constant Power-flux conservation: DU

40. Power reciprocity: DBDB U A U B DADA DU Constant

41. DBDB U A U B DADA DU Constant D A U B - U A D B

42. Applications: Generate reflection response from passive transmission measurements More applications: see http://www.ta.tudelft.nl/PrivatePages/ C.P.A.Wapenaar/Daylight/coda_gji.pdf