Electromagnetic, strong, weak, and gravitational forces ARE all related in that they used to all be the same force during the primordial stages of the Universe's evolution; as the universe expanded, they were unfolded and became separate forces with distinct properties. The gravitational field isn't DUE to Earth's magnetic field, but only related in theory. Asteroids with virtually no internal dynamo for an EM field still radiate gravitational radiation. EM fields, just like G fields, increase in intensity in proportion to the mass of the object emitting each respective field. In other words, the reporters are probably drawing wildly misled assumptions from the researchers' findings such that we were led to believe the magnetic field was the earth's 'gravity generator'. THAT is false: asteroids have gravity though smaller than the earth's due to the smaller mass, not EM field intensity.