Symposium on gravity surveys in western North America



Gravity surveys involve one of the most routine and frequently used types of geophysical measurements; they are made with a steadily improving precision that now exceeds 1 part in 100,000,000 and probably rank among the most sensitive of routine scientific techniques. The surveys have a wide variety of industrial, military, and research applications and are now made by commercial companies, government agencies, universities, and research institutions, each of which has different objectives and operating procedures. The results of some surveys have commercial and military objectives. Consequently, the data remain confidential and unpublished for many years; the objectives of other groups require complicated analyses that also tend to delay publication.