No light from the sun in the UVc / Solar Blind (SB) / <300nm band passes through the O-zone barrier, making the discharge signature nearly unique. There are a few natural or man-made sources of UVc light, but they have other characteristics which makes it possible to identify them.
The SB band is therefore ideal for uniquely imaging the signature of discharge activity. However, the resulting image is just a blob in an otherwise black image.
This is clearly not useful in identifying the location of the discharge activity.
The blob has to be co-located with a visible structure in order to identify the location of the discharge activity.