Explorer 34 magnetic field measurements near the tail current sheet and auroral activity

Details Explorer 34 magnetic field measurements near the tail current sheet and auroral activity Explorer 34 magnetic field measurements near the tail current sheet and auroral activity

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ap%26ss..77..409s&link_type=abstract

Astrophysics and Space Science, vol. 77, no. 2, July 1981, p. 409-442.

Astronomy and Astrophysics

Astrophysics

6

Auroral Electrojets, Current Sheets, Geomagnetic Tail, Magnetic Signatures, Space Plasmas, Explorer 34 Satellite, Geomagnetism, Magnetic Storms, Magnetospheric Instability, Plasma Layers, Statistical Analysis

Scientific paper

Explorer 34 (Imp 4) 2.56 s magnetic data obtained during 131 traversals of the tail current sheet are presented, along with the simultaneous 2.5 min auroral electrojet indices AE and AL. The normal magnetic field satellite crossing times and positions are tabulated for these 131 crossings. Normal magnetic field is defined in the center of the sheet: it is the vector magnetic field at the time of field minimum during the crossing. It is remarkable that the only normal components too large in magnitude to be classified as fine structure occur near the time of onset of an AE event. Cases are discussed where the normal component, defined near the plasma sheet edges, has the opposite sign compared to the normal component defined at the sheet center. For quiet times, the current sheet may be only about 1000 km thick within a 3 earth-radii plasma sheet, and may carry some 10-15% of the total tail current.

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