The Anomaly Interference of MF Broadcast Signals in the VLF Receivers by Luxemburg Effects of Ionosphere as One of the Seismogenic Phenomena

Today, the most observatories of seismogenic emissions to purpose of earthquake prediction are used below VLF frequency range in the world. But usually natural and man-made noise levels of ELF, VLF and LF frequency ranges had been incleased gradurlly entire the earth after 1990. And the detection for earthquake prediction signals (so called seismogenic emission's becomes to impossible for the difficulties of separation of seismogenic signals and other noises under the low S/N ratio. The authors are started an experiment of the moduration signals of MF broadcast stations are able to receive by the VLF receivers as interference signal prior to earthquakes. This phenomena will be able to explain by the effect of anomaly electromagnetic moduration of disturvance of E or F layers of ionosphere by MF broadcast station signal of the Luxemburg effects above epicenter area. The last December 22nd, 1997 at 22:10 JST, a earthquake (M = 4.6, D=10km) was generated at sea bottom of north of Awara observation point of Fukui Univ. of Tech., were frequentry detected anomarous BC signals between one day before and few minuits before the shock without any impulssive noise signal interference.