The characteristics of these cases were representative of the general literature and occurred between the years 1878 and 1967. All 25 experiences were reported to have occurred on days when the geomagnetic activity was less than the means for those months. Repeated measures analysis of variance for the daily aa indices for the 7 days before to the 7 days after the experience confirmed the observation that they occurred on days that displayed much less geomagnetic activity than the days before or afterwards. These results are commensurate with the hypothesis that extremely low fields, generated within the earth-ionospheric cavity but disrupted by geomagnetic disturbances, may influence some human behavior.

Geomagnetic Activity is also related to mental activity.

"Several recent reports have indicated significant relations between extrasensory perception (ESP) experiences and performances and the Earth's geomagnetic field (GMF) activity. ESP experiences are reported more frequently, and accuracy of laboratory ESP is more accurate, on days of relatively quiet GMF activity.

On the other hand, there are indications that a complementary paranormal process, psychokinesis, may be enhanced by high GMF activity. We conducted retrospective analyses of possible relations between GMF activity and (a) electrodermal activity (as an index of sympathetic autonomic activity), (b) rate of hemolysis of human red blood cells in, (c) attempted distant mental (i.e., psychokinetic) influence of electrodermal activity, and (d) attempted distant mental (psychokinetic) influence of rate of hemolysis.

For each of these four measures, high activity was associated with high GMF values, while low activity was associated with low GMF values. The relations were statistically significant for three of the four analyses and showed a consistent trend in the fourth."

Geomagnetic Stimulation of Poltergeist Activity
"Several researchers have reported that poltergeist episodes frequently began on the day (± 1 day) of a sudden and intense increase in global geomagnetic activity. To test this visual observation, a near-complete account of these episodes for which the inception dates were recorded and verified was examined.

Statistical samples clearly indicated that global geomagnetic activity (aa index) on the day or day after the onset of these episodes was significantly higher than the geomagnetic activity on the days before or afterwards. The same temporal pattern was noted for historical cases and for those that have occurred more recently. The pattern was similar for episodes that occurred in North America and Europe. The results were statistically significant and suggest that these unusual episodes may be some form of natural phenomena that are associated with geophysical factors."

PSI Phenomena and Geomagnetism

Several studies in PSI phenomena have been correlated with geomagnetic activity or the lack of it. For example, A. Gauld sent a copy of a long paper that he and H.P. Wilkinson wrote entitled: "Geomagnetism and Anomalous Experiences." We have room for only a short section of their abstract: " ...in the end we were left with a residuum of positive findings:

(a) There is a weak but persistent statistical relationship between lowish absolute levels of geomagnetic activity and the occurrence of spontaneous cases of apparent telepathy/clairvoyance.

(b) There is a small tendency for the days on onset of cases of poltergeists and hauntings to be days of higher-than-usual geomagnetic activity. What underlies these observed relationships remains to be determined."