Pc 1 band micropulsations recorded at Siple, Antarctica, in 1973 are analyzed by Fourier and correlative techniques. Dynamic Fourier analysis shows that events lasting 5 hours or more and occurring near local dawn tend to cnsist of bands which rise in frequency prior to dawn and fall in frequency after dawn. Occasionally, more than one such band is present at a time. Events containing such signatures are frequently modulated in amplitude with periods of the order of an hour. The correlation of Pc 1 occurrences with Kp, at a lag thought to be characteristic of the plasmapause response to magnetic activity, is studied through a three-dimensional histogram of Pc 1 occurrences versus local time and lagged Kp (similar to Roth and Orr (1975)). The distribution of Pc 1 occurrences in this plot is a well-defined band about 3 Kp units wide which migrates across Kp with changes in local time, attaining its lowest Kp values near dawn (highest near dusk). These results of our spectrographic and correlative studies are well understood if the generation region for Pc 1 activity is located at the plasmapause. When the Siple data are interpreted as being of plasmapause origin, they appear to contain useful information concerning plasmapause structure and the propagation path for Pc 1 to Siple. Fluting of the plasmaphere surface is suggested by the periodic modulation of long pulsation trains, which appears to be a modulation of the generation process rather than a propagation effect. Analysis of the extent of the distribution of Pc 1 occurrences over Kp indicates that ionospheric ducting does not contribute strongly to Pc 1 reception at Siple.