"Cecil Moore" wrote in message
m...
Dave wrote:
However, the electric field that must accompany them is what generates
the corona effects that can be heard.

Wouldn't the whole sky glow at night like the
Northern Lights if the entire dust cloud was
ionizing the air to the corona threshold?

no, the field in the air is below the threshold. it is the concentrated
field around objects that cause the field to exceed the threshold.


The fair weather current doesn't meet the
corona threshold so how could corona occur
with a rounded full-wave loop under fair
weather conditions?

the fair weather current and the field that drives it is fairly small, not
normally enough to cause corona or we would be hearing it all the time.