# Are a black hole's jets caused by the black hole's magnetic field?

Do the jets sometimes emitted by a black hole result from its magnetic field? It would seem Jupiter's magnetic field tends to be concentrated at the poles, and I would imagine this might extend to black holes as well. I could see the concentrated fields near the poles accelerating particles either into or away from the black hole at high speeds. I have included an image of Jupiter's magnetic field below:

http://en.wikipedia.org/wiki/Magnetosphere_of_Jupiter#Role_of_Io

It also appears that a black hole's magnetic field is indeed very strong: http://www.iflscience.com/space/magnetic-fields-can-be-strong-black-holes-gravity

• I will never understand the SE users downvoting policy. – Py-ser Feb 7 '15 at 8:53