For more detail go to the link and click on the image for a high definition image. You can then move the magnifying glass cursor then click to zoom in and click again to zoom out. When zoomed in you can scan by moving the side bars on the bottom and right side of the image.
Is lightning AC or DC? If it is DC then are the clouds plus, ( + ) and the Earth minus, ( - ) or the reverse? If it is AC then what is the Hertz? Is it high voltage or high current or both? Inquiring minds want to know. ;-)
That is such a cool picture! Lots going on….