Fig. 6From: Reconnection and interchange instability in the near magnetotailEntropy function S in the z=0 plane in the MHD simulation. Entropy quantity (1) in the equatorial plane at two different times; modified from Figure eight of Birn et al. (2011). Arrows show velocity vectors with v>100 km/s, and solid black lines represent B z =c o n s t. contours; the one farthest to the right is the B z =0 contourBack to article page