Bokkon's hypothesis that dreams involve the generation and perception of biophotons offers a possible explanation for the occasional experience of future events during these states. The Lorentz temporal dilatation during dream periods for biophotons with THz frequencies (neuronal soma diameters) is 3 to 4 days which is an average value between dream experiences and later events. For 40 discrete cases, the global geomagnetic activity at the time of the dream experience was moderately correlated with what the geomagnetic activity would be two to three days before the actual event. The convergence of geophysical and cerebral properties indicates that intrinsic properties of biophotons may allow the experience of some process that precedes the apparent event (or influences its occurrence) rather than the event itself.