Balloon observations of auroral zone X rays in conjugate regions: 1. Slow time variations

Conjugate aspects of auroral zone electron precipitation are examined using data from ten simultaneous balloon flights of X-ray detectors from Fairbanks, Alaska, and Macquarie Island, Australia, as well as riometer data from Kotzebue and College, Alaska. These results indicate a close correspondence, in similarity and simultaneity, in regions of near conjugacy over a wide range (Kp = 0+ to 60) of geophysical disturbance. Whereas gross features of activity remain intact, dissimilarities become quite evident at locations well removed from near conjugacy.