Do flux transfer events cause long-period micropulsations in the dayside magnetosphere?

Details Do flux transfer events cause long-period micropulsations in the dayside magnetosphere? Do flux transfer events cause long-period micropulsations in the dayside magnetosphere?

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92.5820g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, June 1, 1987, p. 5820-5826.

Physics

20

Geomagnetic Micropulsations, Magnetic Flux, Magnetospheric Instability, Satellite Observation, Goes 2, Goes 3, International Sun Earth Explorer 3, Interplanetary Magnetic Fields, Magnetic Signatures

Scientific paper

Russell and Elphic (1979) suggested the possibility that flux transfer events (FTEs) generate long-period micropulsations in the outer, dayside magnetosphere. The reasons for this hypothesis are examined and results are presented for two pulsation surveys designed to test it. In the first survey, observations of micropulsations by GOES 2 are compared with ISEE 3 and IMP observations of interplanetary magnetic field (IMF) direction; since FTEs are highly correlated with southward IMF, a similar correlation between pulsations and southward IMF was sought. In the second survey, a catalog of ISEE 1 and 2 magnetopause crossings is compared with magnetometer readings from GOES 2 and 3 to determine whether Pc 4 and Pc 5 pulsations are more likely to occur after FTEs have taken place. Results indicate that there is a correlation between FTEs and transversely polarized Pc 4 pulsations with periods between 60 and 120 s, but not between FTEs and Pc pulsations with periods greater than 120 s. This suggests that the generating (or driving) frequency associated with FTEs lies between 60 and 120

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