  As a deep-Earth energy source, the planetocentric nuclear-fission georeactor
concept is on a more secure scientific footing than the previous idea related
to the assumed growth of the inner core. Unlike previously considered
deep-Earth energy sources, which are essentially constant on a human
time-scale, variability in nuclear fission reactors can arise from changes in
composition and/or position of fuel, moderators, and neutron absorbers.
Tantalizing circumstantial evidence invites inquiry into the possibility of
short-term planetocentric nuclear fission reactor variability. This brief
communication emphasizes the importance of scientific integrity and highlights
the possibility of variable georeactor power output so that these might be
borne in mind in future investigations, especially those related to the Earth's
heat flux.
