<p>Geophysics is sub-specialty of the broader field of Geology and I do not believe that many schools offer a BS in Geophysics. students normally get an MS or PhD in Geophysics after earning a BS in either Physical Geology or General Physics and taking the bulk of their Geophysics courses as graduate students. </p>
<p>A possible course of action might be to major in Geology as an undergraduate but take a large number of electives in Physics or major in Physics and take all of your electives in Geology. Then you could apply as a Geophysics major to some of the fairly large number of universities that offer graduate programs in Geophysics.</p>