Two types of magnetospheric ELF chorus and their substorm dependences
1977; American Geophysical Union; Volume: 82; Issue: 32 Linguagem: Inglês
10.1029/ja082i032p05112
ISSN2156-2202
Autores Tópico(s)Geomagnetism and Paleomagnetism Studies
ResumoThe distribution of extremely low frequency (10-1500 Hz) magnetospheric chorus to all local times and latitudes is investigated in order to determine dependence on substorms, and to evaluate the conditions under which chorus is generated. The analysis carefully separates space and time effects by an investigation of data obtained by the OGO 5 search coil magnetometer. A study of spatial dependencies shows that chorus occurs in two magnetic regions: equatorial chorus is located near the equator, and high-latitude chorus is located above 15 degrees. An analysis of chorus in each of the regions illustrates that equatorial chorus is definitely related to substorm, whereas high-latitude chorus often occurs within magnetically quiet intervals.
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