Thanks for pointing out that atypical plume on the NEBs.
  Attached is a compilation of images showing various features on the NEBs from January.
  There were some unusually bright spots, some being methane-bright, and an elaborate dark 'projection'.
  I suppose these were normal types of features but perhaps more vigorous than usual following the NEB Revival? 
 
(This image set was not included in my recent post because there were already too many compilations of other,
 more structured phenomena!) 


John H. Rogers,Ph.D.
Jupiter Section Director,
[British Astronomical Association.]