NASA scientist Friedeman Freund, faculty member at San Jose State University in California, may have demonstrated in the laboratory the way in which the earth's crust can perform as a huge battery to drive a geological radio circuit that extends more than 30 kilometers below the ground. This is very significant, since the experiments done by Freund represent a significant advance in the ability to understand why radio frequency phenomena come before some quakes and also why they are not experienced before others. Last year, Freund made a breakthrough after doing experiments that treat rocks more gently than in his earlier experiments. He determined that rocks that were subjected to moderate pressure or heat would result in a sustained hole current (electron deficiency). Because Freund found that hundreds of cubic kilometers of rock could feel sufficient stress to send hole currents toward the surface of the Earth in hours and days before a quake, the result would be generation of infrared signals near the surface and also interactions with electrons in the ionosphere. Further experiments are described that might indicate that sufficiently deep extension of stressed rock (or another connecting path) can result in electron currents flowing out of the rock at a lower level, paralleled by a hole current above. Freund's experiments and their results are described in some detail.