Electric Hollow Earth/Planets Theory based on Electric Universe Model
https://www.amazon.com/Hollow-Planets-Feasibility-Lamprecht-Paperback/dp/B00NICUY4O
https://forum.davidicke.com/showthread.php?t=322079
Hollow Planet Seismology Vs Solid Earth Seismology
https://www.bibliotecapleyades.net/tierra_hueca/esp_tierra_hueca_9.htm
What Magnets reveal under Ferrocell.
NASA Experiments.