Asteroid impact, Schumann resonances and the end of dinosaurs

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