  We investigate the effect of an external magnetic field on the velocity
autocorrelation function and the "caging" of the particles in a two-dimensional
strongly coupled Yukawa liquid, via numerical simulations. The influence of the
coupling strength on the position of the dominant peak in the frequency
spectrum of the velocity autocorrelation function confirms the onset of a joint
effect of the magnetic field and strong correlations at high coupling. Our
molecular dynamics simulations quantify the decorrelation of the particles'
surroundings - the magnetic field is found to increase significantly the caging
time, which reaches values well beyond the timescale of plasma oscillations.
The observation of the increased caging time is in accordance with findings
that the magnetic field decreases diffusion in similar systems.
