Complex sentence: However, such fluctuations are not always connected to alleged paranormal activity, since they can also occur naturally in correspondence to the ammounts of solar radiation, or if the meter passes over an electrical device that is turned on or off while the meter is over it.
Split into simpler sentences: However, such fluctuations are not always connected to alleged paranormal activity. They can also occur if the meter passes over an electrical device that is turned on or off while the meter is over it.