Expedition Menu
1. Introduction
The Question
3. Funding
4. Study Area
5. Background
Seismogenic Zone
7. Chief Scientists
8. The Journey
9. Ship Tour
10. Leaving Port
11. Seismic Method
12. Seismic Source
13. Seismic Recording
14. 3-D Acquisition
15. Life at Sea
16. In the Lab
17. Time to Depart
18. Data Processing
19. The 3-D Volume
20. Interpretation
21. Your Turn
22. Comparison
23, Publication
24. IODP Drilling

NSF Logo
This material is based
upon work supported
by the
National Science Foundation
Grant No. 0633234



NanTroSEIZE in 3-D

Imaging an Active Plate Boundary Fault
11. Seismic Reflection Method

Integrarted Ocean Drilling Logo

Animation Showing Seismic Reflection Method
Modified from French Research Institute for Exploitation of the Sea,
followed by computer animation of 3-D seismic acquisition modified from
Petroleum Geo-Services ASA

Nordic explorer at Sea
R/V Nordic Explorer towing acoustic source and hydrophone streamer

Ship and raypaths diagram
Diagram of Seismic Reflection Method Showing Ship with hull-mounted echo-sounder and towing sound source (green dot) and hydrophone streamer behind ship (modified from French Research Institute for Exploitation of the Sea) http://www.ifremer.fr/fleet/equipements_sc/animationflash/sismique.htm

Seismic traces
Individual Seismograms or Seismic Traces generated by one burst, or shot of seismic energy, recorded by one section (channnel) of hydrophone streamer

Thousands of Seismic Traces, enhanced with digital signal processing, Plotted Side-by-Side to Construct a Seismic Section
Showing Seafloor and Underlying Sediment Layers

©Copyright 2009
July 23, 2009

Send to Don Reed

Department of Geology
San Jose State University
NanTroSEIZE Drilling Objectives
Modified from IODP Nankai Trough Seismogenic Zone Experiment

Seismic Sources - Producing the Signal