There is a scientific treatise promulgated by Dr. Edwin May and James Spottiswoode called:
Anomalous Cognition Effect Size: Dependence on Sidereal Time and Solar Wind Parameters
An association between geomagnetic field fluctuations and AC effect size has been
observed for trials which occur near 13h LST. This association has also been seen in one
parameter, the solar wind speed, which is known to affect the GMF. Finally, a possible
identification of solar modulation in the effect size data itself has been found. These
observations are consistent with the thesis that some component of solar activity, which
correlates with solar wind and GMF variations, is modulating the amount of AC observed
in laboratory experiments. It is not yet possible to determine what exactly this parameter
is, or even where it is acting. One assumption is that the physical conditions at the
location of the subject, or receiver, are crucial to performance. But this need not logically
be so: conditions along the path through space-time followed by the AC information
could also affect the propagation. Certainly if the mechanism of AC information transfer
is at all analogous to that of the other senses, this should be expected. The great
difficulty in the case of AC is that the location of the signal source is unknown, and
therefore also the path followed by the information.
In a database of 2,879 free-response anomalous cognition (AC) trials, correlation between the geomagnetic index and AC, an increased correlation was found for trials that occurred at 13 hours Local Sidereal Time (LST). A subset of this data for which solar wind speed measurements were available showed a similar correlation configuration with a negative correlation peak near 13h LST. The power spectrum of the effect sizes showed a peak at 13.8 days period, which is close to twice the solar rotation rate, a period typical of solar wind modulations. These observations are consistent with the thesis that AC performance is modulated by a parameter which varies with solar activity.