Turbulent Reynolds, Maxwell, and gravitational stresses at a given time as a function of radius for the CHEM_MHD simulation. Top: for R < 5 kpc. Bottom: for R < 200 pc. At 200 < R < 3 kpc the gravitational stresses dominate, and therefore the bar-driven inflow is driven by the gravitational torques of the Galactic bar (as the name would imply). At 0 < R < 200 pc the Maxwell stress dominate, and therefore the nuclear inflow is driven by magnetic fields. We note that the top and bottom panels are for different snapshots, which are selected to better capture the moments the bar-driven and nuclear inflows take place.