Most people have seen pictures of the sun when flames shoot from the surface and crash back down.  These increase energy in the geometric field by forcing x-rays and radiation into space and towards the planets, including Earth.  A geomagnetic storm occurs when those charged particles from the sun hit the Earth's surface.  This can cause interference with electrical equipment, especially radios and televisions.

Entities need a lot of energy to move or manifest, which is proven in the field with EMF spikes and battery drain during paranormal activity.  A perfect time for them to "feed" off natural energy is when there is a high level of solar x-rays and geomagnetic storms.  With the increase of energy, it is said there is also an increase of paranormal activity.