Pre-midnight Hours Research Articles

Correlated auroral and geomagnetic micropulsations in the period range 5 to 40 seconds

This is a report of simultaneous observations made of auroral and geomagnetic fluctuations at Byrd Station during the antarctic winter of 1961. The diurnal variation and period spectrums of regular pulsations in the period range 5–40 sec are presented. A peak-for-peak analysis of the fluctuations shows a strong correlation between the auroral fluctuations and the regular Pc 3 micropulsations. These correlated pulsations are most frequent in the post-midnight hours and are distinguished from the impulsive events occurring in the pre-midnight hours.