VLF detection of fireballs

The results from 80 hours of simultaneous visual/video and VLF recordings made during the Lyrids, Perseids, Orionids, Leonids and Geminids are presented, All meteor magnitudes from -11 to +4 have been sampled at least once during these observations. The only positive VLF fireball detection was made at 19:57:32 UT on August 11, 1993 from the South of France, We present a Fourier transform analysis of this event and we also derive a lower limit to the electrical field strength produced by the fireball at the antenna, Our present observations suggest a lower limit of M(v) approximate to -10 +/- 1 for a fireball to produce a VLF signal.