Field Work

   A typical day for us started around 7:00 am when we meet for breakfast before departing for the field at around 7:30. After a 30-45 minute drive out to the site two people would begin prepping the source and Dr. Liberty would ready the equipment in the recording van, while the rest of us laid out cable, planted geophones, and painted identifying numbers next to the geophones. After enough of the line was laid out we could begin shooting. Typically, we fired four hammer blows at the midpoint between each of the geophones which were planted at 5m intervals. As the source progressed along the line we would have to pull up cables and geophones from the beginning of the line and relay them at the fair end of the line so that we could continue to shoot or hammer without interruption. Once we got started shooting one person would typically begin surveying the line by recording the position of each geophone with the GPS unit. From day to day we alternated jobs so that everyone had many opportunities to lay and pick up cable out of the Mule, operate the source (weight drop or hammer for short), survey the line with the GPS, or work with Lee in the recording van.

   The time that we got to spend up in the Seattle area doing fieldwork these last couple weeks was great. Although we worked 10-12 hour days 7 days a week, we were able to take the ferry from Bremerton into Seattle several evenings.   Overall, the work was interesting, the scenery and weather were beautiful, and the company was splendid.

 

Thanks for giving us the

Thanks for giving us the rundown on a day-in-the-life. Roll-along profiles are definitely the most effective way to approach long surveys, although they sometimes take a little more time to coordinate. Was the experiment overall a success or were there any unanticipated problems? How much longer do you have in Boise to work on the data?

So what are the next steps

So what are the next steps in the process now that you are back from the field?