Interplanetary energy flux associated with magnetospheric substorms

Details Interplanetary energy flux associated with magnetospheric substorms Interplanetary energy flux associated with magnetospheric substorms

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27..425a&link_type=abstract

Planetary and Space Science, vol. 27, Apr. 1979, p. 425-431.

Physics

30

Interplanetary Magnetic Fields, Magnetic Flux, Magnetic Storms, Magnetospheric Instability, Radiant Flux Density, Solar Wind Velocity, Graphs (Charts), Kp Index

Scientific paper

It is demonstrated that the interplanetary quantity epsilon(t), obtained by Perreault and Akasofu (1978), for intense geomagnetic storms, also correlates well with individual magnetospheric substorms. This quantity is given by epsilon(t) = VB-squared sin to the 4th power (theta/2) (l sub 0)-squared, where V and B are the solar wind speed and the IMF magnitude, respectively, theta denotes the polar angle of the IMF, and l sub 0 is a constant equal to about 7 earth radii. The correlation is good enough to predict both the occurrence and intensity of magnetospheric substorms observed in the auroral zone by monitoring the quantity epsilon(t) upstream of the solar wind.

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