SHORT-RANGE SPATIAL COHERENCE OF GEOMAGNETIC MICROPULSATIONS

Abstract
An experiment designed to measure the coherence of natural geomagnetic signals at two stations 10 kilometers apart is described. A qualitative measurement was performed on a section of 1 c.p.s. signal (of unusual occurrence) and a quantitative measurement on a section of normal daytime record. The coherence tends to be high for moderate signal levels.