Orientation of Z-Pinch Instabilities from an Intense Aurora as Recorded in Antiquity: South America by D Scott and A L Peratt (Tony Peratt) is a very very short free PDF showing the summary of their paper or talk as a Conference Record of the 31st IEEE International Conference On Plasma Science.
Another very short but interesting and important information on the ancient rock carvings known as petroglyphs and the 'Squatter Man' image (a Peratt Instability?). There is also a Western USA version.
View more free PDF's on petroglyphs including the very important Characteristics for the Occurrence of a High-Current, Z-Pinch Aurora as Recorded in Antiquity by Anthony Peratt.
Quote from Orientation of Z-Pinch Instabilities from an Intense Aurora as Recorded in Antiquity: South America
The morphological types of petroglyphs oriented eastwards appear to belong to instabilities much further out in the inflowing plasma. This suggests that the plasma, at least intense enough to be seen at dawn and/or dusk, curved in from the east to flow inwards along the Earth’s southern magnetic pole. This geometry is further supported by ‘eclipsed’ pictographs in Australia.
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