Transient Sheets of Field-Aligned Current Observed by DMSP During the Main Phase of a Magnetic Superstorm
AIR FORCE RESEARCH LAB HANSCOM AFB MA SPACE VEHICLES DIRECTORATE
Pagination or Media Count:
Reported are the first observations of intense 1 Am but transient sheets of field-aligned currents FACS that couple of the central plasma sheet with the auroral ionosphere near the maximum epochs of magnetic superstorms. Maximum magnetic perturbations associated with the FACs normally develop at middle 55 deg - 60 deg magnetic latitudes. Our attention was drawn to these phenomena while comparing ground magnetometer responses to measurements by particle and field sensors on Defense Meteorological Satellite Program DMSP satellite during a 4-hour period on 6 April 2000. Six empirical aspects of the data appeared to be unusual.