Herndon suggested that the composition of the inner core of Earth is nickel silicide; the conventional view is that it is iron–nickel alloy.[3] In 1992, he suggested "georeactor" planetocentric nuclear fission reactors as energy sources for the gas giantouter planets,[4] as the energy source and production mechanism for the geomagnetic field [5] and stellar ignition by nuclear fission.[6][7] Scientists who have scrutinised these ideas have challenged the underlying assumptions and proposed mechanisms. In a paper on the nuclear reactor hypothesis, Schuiling argues that 'it is unlikely that nuclear georeactors ... are operating at the Earth's centre'.[8]
Recent measurements of "geoneutrino" fluxes in the KamLAND and Borexino experiments have placed stringent upper limits on Herndon's "georeactor" hypothesis on the presence of an active nuclear fission reactor in the Earth's inner core, so that such reactor would produce less than 3 TW.[14]
Chemtrail theory proponent
Herndon has become a proponent of the chemtrail conspiracy theory[15] and published several peer-reviewed papers claiming that coal fly ash is being sprayed for geoengineering.[16] In 2016, two of his papers, however, were retracted because of flaws;[17][18][19] Herndon disputed the reason for retraction, claiming the retractions were "a well-organized effort (CIA?) to deceive... Those concerted efforts to cause said retractions prove that the high officials who ordered the spraying know very well that they are poisoning humanity and want to hide that fact".[20]
^Herndon, J. M. (1979) The nickel silicide inner core of the Earth. Proc. R. Soc. Lond. A368, 495-500
^Herndon, J. M. (1992) Nuclear fission reactors as energy sources for the giant outer planets, Naturwissenschaften 79, 7-14.
^Herndon, J. M. (2007) Nuclear georeactor generation of Earth’s geomagnetic field. Current Science, V. 93, No. 11, 1485-1487.
^Herndon, J. M. (1994) Planetary and protostellar nuclear fission: Implications for planetary change, stellar ignition and dark matter. Proc. Roy. Soc. Lond., A455, 453-461.
^Herndon, Marvin J. "January 16, 2015 Email to San Diego Mayor, Copies to City Council Members"(PDF). Nuclearplanet.com. Retrieved 20 February 2017. Almost every day jet airliners are spraying innumerable so-called "chemtrails" and they persist after release behind the jets to gradually form clouds. Chemical clouds. Toxic clouds.