Jack Painter wrote:
"---explain the term "Common mode lightning"."

A folded monopole or another antenna with a 1/4-wave short-circuited
stub across its drivepoint is a low impedance except at resonance. At
other frequencies containing most of the lightning energy, the exposed
antenna is a short to the grounded tower. At the resonant frequency, the
same voltage with the same polarity is imposed on both the center
conductor and the inside of the coax shield.

Inside the coax, currents in one conductor induce opposing and near
equal currents in each other, cancelling. It worked for me in hundreds
of locations over decades of time including countless lightning strikes
to what was often the most exposed and salient structure for miles
around.

Best regards, Richard Harrison, KB5WZI