2 Basic stages of a lightning spark
... 103 cm ) .
30kV / cm e0
Measurements of the field, produced by the charge separation in the cloud,
give the values 1 – 8 kV/cm for the cloud region, and at the earth, the storm field was
found to be 10 – 200 V/cm. In spite of such a low field a leader does propagate,
which means, that there is ...