USE OF SECOND-ORDER ELECTROSEISMIC EFFECTS IN ELECTRIC PROSPECTING

The second-order electroseismic effects described may be divided into three classes: electroseismic, electromagnetic, and piezoelectric. Application of these effects to prospecting for certain types of geological features such as quartz veins and pegmatites indicates new methods of subsurface exploration. A brief review of methods and procedures is discussed with results of testing over a pegmatite which is not exposed at the surface.—C. E. Sears, Jr.