Slow-mode shocks: A semipermanent feature of the distant geomagnetic tail
Article first published online: 20 SEP 2012
Copyright 1985 by the American Geophysical Union.
Journal of Geophysical Research: Space Physics (1978–2012)
Volume 90, Issue A1, pages 233–240, 1 January 1985
How to Cite
1985), Slow-mode shocks: A semipermanent feature of the distant geomagnetic tail, J. Geophys. Res., 90(A1), 233–240, doi:10.1029/JA090iA01p00233., , , , , , and (
- Issue published online: 20 SEP 2012
- Article first published online: 20 SEP 2012
- Manuscript Accepted: 21 AUG 1984
- Manuscript Received: 23 APR 1984
A survey is made of the relative frequency of encounters with slow-mode shocks observed by ISEE 3 in the distant geomagnetic tail. The association of these shocks with the phase of substorm activity as evidenced by enhanced currents in the auroral ionosphere and enhanced energetic-particle populations at geostationary orbit is also documented. During the 25 days between January 18 and February 11, 1983, 26 unambiguous examples of slow shocks were observed. Although a very strong association with the level of geomagnetic activity is found, shocks were observed during all phases of substorm activity including one during quiet conditions. Slow-mode shocks must therefore be a semipermanent feature of the bounding surfaces which separate lobe and plasma sheet particle populations in the distant geomagnetic tail.