  We consider dark matter velocity distributions with an anisotropic component,
and analyze how the velocity structure can be probed in a solid state
ionization detector with no directional detection capability using a daily
modulation effect due to the anisotropic response function of the target. We
show that with an energy resolution of < 10 eV it is possible to identify the
presence of an anisotropic component consistent with observations for sub-GeV
dark matter, and that introduction of daily modulation information
substantially improves the sensitivity in a narrow mass range.
