Magnetic fields and particle signatures in the vicinity of nightside geosynchronous altitudes in the first one-minute-interval of Pi 2 onset: a case study

Details Magnetic fields and particle signatures in the vicinity of nightside geosynchronous altitudes in the first one-minute-interval of Pi 2 onset: a case study Magnetic fields and particle signatures in the vicinity of nightside geosynchronous altitudes in the first one-minute-interval of Pi 2 onset: a case study

Jan 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jastp..62...17s&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 62, Issue 1, p. 17-30.

Physics

2

Scientific paper

An onset of Pi2 pulsations was detected at 0402 UT on 26 August 1986 in the midnight sector by the fluxgate magnetometer at the dip-equator (Huancayo, Peru; 1.44°N, 355.9° in geomagnetic coordinates; 12.1°S, 75.2°W in geographic coordinates; /L=1.00). At the same time in the midnight magnetosphere, GOES 6 (/L=6.6, 2128 LT), GOES 5 (/L=6.6, 2306 LT), 1982-019 (/L=6.6, 0133 LT) and AMPTE/CCE (/L=7.1, 0206 LT) were monitoring the magnetic fields and flux of low-energy particles (electrons; 30-200 keV, protons; 63-230 keV). An examination is made here for the initial disturbances in the first 1-min of Pi2 onset as observed by these satellites in the night-time magnetosphere. It is found that the initial disturbances in the vicinity of the geosynchronous altitudes are not confined to narrow longitudes but appear over a wide range of longitudes that may span 21-02 LT. These disturbances are discussed in terms of the plasma filling processes of the flux tubes.

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