  Relativistic runaway electron avalanches (RREAs) developing in electrified
clouds produce gamma radiation which could be observed both on the ground
surface and on near-Earth orbit. Radio emission of RREAs is a much less studied
manifestation of the avalanche process. Meanwhile, VHF-radiation can be used as
an additional source of information on conditions of the RREA development.
  We present the method of calculating the VHF signal produced by RREAs using
Monte-Carlo simulation with GEANT4. We show that VHF radiation produced by
runaway electrons has a maximum at frequency range 0.1--1 MHz, the amplitude is
below the background noise.
