chkt, TYB!
Schumann resonance site closes open access; requires registration.
http://sosrff.tsu.ru/
Anon translated; see picrel1.
Here's the form:
http://sosrff.tsu.ru/new/Reganketa.docx
(They make it difficult to copy/inspect from their site; anon uses uBlock Origin, see picrel2 for howto.)