The presence of an external static magnetic field is shown to influence the
excitation dynamics of angular Rydberg wavepackets significantly. With lin
early polarized light and a magnetic field applied in an orthogonal directi
on, we obtain a large fraction of the final state population with magnetic
quantum number \m \ > 0. This induces a stronger localization of the electr
on on either side of the nucleus compared with the B = 0 case. Also the B-f
ield leads to a rotation of the electronic charge density which can be unde
rstood classically by considering the Lorentz equation.