Someone wrote:
"----the EMF on the antenna will cause it to vibrate in the earth`s
magnetic field, and while this motion is extremely small, considering
the relative wavelength and propagation speeds, an exact analysis may
find that it is similar to the speaker`s cone motion when reproducing
music."

Inertia causes things at rest to tend to remain at rest and not to
respond to casual stimulation. Only the resonant reed responds in the
vibrating reed frequency meter. Likewise, one can, with enough
excitation, get a d-c meter to try to track the a-c voltage cycle of a
very low-frequency oscillator. But, as one increases the frequency a
point is soon reached where the d-c meter needle falls to zero and won`t
budge in response to the a-c excitation. The needle assembly just has
too much inertia to be moved before its excitation impulse is reversed.
All the needle can do is stay put.

In the case of an antenna stimulated at a radio frequency, I think
physical response is out of the question due to inertia. Further, I`ve
observed countless towers and wire antennas audibly singing in the wind,
but never noted any Doppler effect on the radio signal.

Best regards, Richard Harrison, KB5WZI