  We estimate the expected magnitudes of the Schumann resonance fields
immediately after the Chicxulub impact and show that they exceed their
present-day values by about $5\times 10^4$ times. Long-term distortion of the
Schumann resonance parameters is also expected due to the enviromental impact
of the Chicxulub event. If Schumann resonances play a regulatory biological
role, as some studies indicate, it is possible that the excitation and
distortion of Schumann resonances as a result of the asteroid/comet impact was
a possible stress factor, which, among other stress factors associated with the
impact, contributed to the demise of dinosaurs.
