Thanks to that link, I was able to find (had to click the 'full screen" option, then blow it up to 200% to read both the text & the captions) this:
Anthony Peratt - Characteristics for the Occurrence of a High-Current, Z-Pinch Aurora as Recorded in Antiquity IEEE Transactions On Plasma Science vol 31 #6 December 2001
SunkenCiv, you'll want to look at this...if it isn't already in your copious files. ;-')
Okay, I see that one of yours is the color version of one of the three links I posted. I was able to download it from Scrib’d. Thanks.