FIGURE 4. Spectrogram showing evidence for a boundary layer just inside the magnetopause.
From the following article:
The dusk flank of Jupiter's magnetosphere
W. S. Kurth, D. A. Gurnett, G. B. Hospodarsky, W. M. Farrell, A. Roux, M. K. Dougherty, S. P. Joy, M. G. Kivelson, R. J. Walker, F. J. Crary and C. J. Alexander
Nature 415, 991-994(28 February 2002)
doi:10.1038/415991a
These observations were made on 30 May 2000 by Galileo and show an extended intermediate-density region between the magnetopause as determined by the magnetic field and the low-density magnetospheric lobe. We suggest that this region is analogous to Earth's low-latitude boundary layer. 
III, system III longitude; m, magnetic latitude; LT, local time; H, hours.