But because the layers distorted seismic readings, there was no way to know where and how deep to drill.

Then I worked on taking gravimet- ric and seismic readings.

What about some lines of shot holes for a few seismic readings?

In addition, improvements in seismic reading have enabled Shell to go ahead.

I just came in to see if you have the seismic readings from those tremors we've been having?

You can get that kind of seismic reading from high explosives.

"All we want is for you to go away and quit messing up our seismic readings!"

But during the long descent, the strange seismic readings had faded away.

I was getting tiny seismic readings just as you went off-line.

The ship seems to be digging in-look at the seismic reading on 4-B.