No problem, my post was a little buried.
Well, electroweak is one of the fundamental forces of nature. It was originally thought that electromagnetism and weak forces were distinct, but it was later learned that they were just the same force, hence electroweak.
At any rate, its a long theory, but the theory goes that since Heisenberg Uncertainty Principle allows for very brief violations of conservation of mass, energy is transferred through "virtual" particles, where the particle violates COM, transfers energy, and then disappears pretty much. Odd theory, but backed by quite a bit of evidence.
Electromagnetism is magnets and electricity, yes, but the exact same thing happens in nuclear scenarios...not sure what the weak EM force and strong EM forces are....
But at any rate, are you postulating that these virtual photons are curving spacetime for some odd reason on macroscales? No matter what strength you postulate the Earth's magnetic field to be, you'd have to have an INSAAAANE field strength to do what you're talking about. The postulated energy of a photon is measured in MeV's, which are about 1.60217646 × 10^-13 J, plus we have to tack on the energy-mass conversion thingamabob, which is around 10^-16, plus we have to use the gravitational constant G, for another 10^-11...That puts us in the ballpark of around 10^-40...Now, the only way we see an observable effect of space-time is probably if you have an energy field in the ballpark of 10^30th power joules, or basically, more energy than we have probably ever seen, which begs the question, where does this energy come from? And furthermore, why don't we observe the other effects of this curved spacetime, namely, extra gravity?