Abstract
A long period (∼6 min) hydromagnetic wave was observed near L∼4 in the southern hemisphere at both Halley Bay and Siple, Antarctica, to have a substantially larger amplitude than that observed in the northern hemisphere conjugate areas. At Halley Bay, as well as at Siple, the wave appeared quite monochromatic. Data from a station array conjugate to Siple in the northern hemisphere showed the wave to be localized near L∼3.4. Whistler wave determinations of the equatorial electron densities show the wave to occur inside the plasmasphere. The wave period and localization region are not readily reconcilable with a cold, pure hydrogen plasma. The density of heavy ions that would be required within the plasmasphere to explain the observations appears excessive from present understanding of magnetosphere plasmas.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call