it makes me think about something too... i don't know about the interference of delay from the circuit but if you have a receiver of the resonant frequencies in that range, would it be helpful or harmful to amplify and repeat them?

the reason why i'm thinking of this is that the wavelengths are extremely long and a simple repeater would not create very much lag, under the microsecond range

the harm of exposure to radiation that suppresses reception of these frequencies has to do with them being squelched out and not received, and they are so slow (compared to electronic devices) that i think it is possible a schumann repeater would actually help a lot

in any case, we still receive this signal deep underground in caves... there is much evidence to suggest that during the disaster cycles of each 6000/12000 years humans lived in caves, the Magura Caves in Bulgaria are an example of this, and they even have depictions of what i think are Cosmic Thunderbolts (they look like a dancing girl stick figure)