  We propose a mechanism to make gravitational waves (GWs) visible in the
electromagnetic domain. Gravitational waves that propagate through a strongly
magnetized plasma interact with the plasma through its anisotropic
stress-energy tensor and excite magnetohydrodynamic (MHD) wave modes. In
catastrophic events such as the merger of a double neutron star binary, a large
fraction of the total binding energy of the system is released in the form of
GWs observable by LIGO, and the amount of energy transferred to the MHD waves
is substantial. These modes, however, are excited at the same frequency as the
GW and are not directly observable. In this paper we investigate radiation
processes that operate in the presence of the gravitationally excited MHD waves
and radiate in the radio regime accessible to LOFAR. We present order of
magnitude estimates for the spectral flux of a merger detectable by a LOFAR.
