Abstract
Recent multipoint studies of ULF waves in the Pc 1 to Pc 3 period range using data from search coil magnetometers and other instrumentation at South Pole and McMurdo, Antarctica, located at magnetic latitudes typical of the polar cusp/cleft and polar cap, respectively, have identified an apparent high latitude source for two classes of ULF activity: Pc 1-2 wave trains are associated with ∼70% of FTE-like magnetic pulsations observed when South Pole Station is near the dayside cusp, and narrowband Pc 3’4 activity, which appears to peak at cusp/cleft latitudes, is related to radial or near-radial IMF conditions through the generation of “upstream waves” in the ion foreshock. On the basis of these observations we suggest a new mechanism for the transmission of upstream wave signals into the magnetosphere and the generation of Pc 3 pulsations in the dayside outer magnetosphere.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
