Acknowledgments

We are grateful to Simon Klemperer for general field guidance, to Jerry Harris for suggesting the waveform separation technique and other technical tid-bits, and to Steve Pride for the field experiment design and all-around electroseismic instruction. Thanks to Jon Claerbout for suggesting the use of PEF's and other invaluable processing advice; and to all members of SEP, but particularly Brad Artman, Morgan Brown, and Bob Clapp for help getting up-to-speed on the SEP computer system, and for help with coding. Also, the data presented here would not exist without the effort of those who swung the hammer: Steve Pride, Nick Martin, Jonathan Franklin, Jordan Muller, T.J. Kiczenski and Stephan Bergbauer. Jim and Carolyn Pride graciously provided the field site, four dumptrucks full of sand, and some of their outstanding wine. Art Thompson provided some essential electronics, along with important input on data collection. Funding has been provided by the Stanford School of Earth Sciences McGee Fund, the AAPG student research grants, and by the GSA student research grants.