  Solutions of the Maxwell equations for electrostatic systems at rest on the
rotating Earth's surface are shown to exhibit a nonvanishing magnetic field
despite zero electric currents in the system. Such a field is of pure geometric
origin, and in contrast to the conventional magnetic field of the Earth it can
not be screened away by magnetic shielding. A practical significance of this
magnetic field is that its EDM-like background signal would persist in the much
discussed searches for the EDM of charged particles of magic energy trapped in
all electric storage rings, as well as in the neutron EDM experiments.
