Hi EQF. I really fail to see that there is anything to discuss. The quake occurred in the Hokkaido area instead of Tokyo, because a quake wasn’t going to occur in the Tokyo area in the first place.

Yukio Misumi, an astronomer in Japan uses the VHF range of radio waves to predict the timing and intensity of the impending quake.

At VHF/UHF frequencies the range decreases as frequency increases. In general, VHF/UHF waves have a range not much beyond "line of sight". Line of sight is how far you can see. The range of VHF/UHF may be slightly beyond line of sight due to refraction at the horizon. Refraction refers to the bending of the radio wave.

VHF and UHF are normally used for local communications, whereas HF is suitable for long distance communication. There is however problems associated with VHF.

Higher frequencies, that is VHF and UHF, are not reflected by the ionosphere but pass straight through it. VHF and UHF signals go straight through the ionosphere and are lost in space [unless communicating with a satellite or spacecraft]. Therefore, VHF and UHF radio waves are normally used over short distances i.e. line of sight. .

The ionosphere is a layer of conductive gas at heights between 70 and 400 km. The ionosphere is part of the Earth's atmosphere that reflects HF radio waves back to Earth, giving the advantage of a greater range but it has no real effect on VHF or UHF radio waves that pass through and are thus lost into space.

ELF and ULF are another different breed of kitty altogether. These signals were detected just before the Loma Prieta and during the Loma Prieta quake. "ULF: ultra low frequency are in the 300-0 Hz range although there are some difference of opinions in this matter. Geomagnetic pulsations; i.e., ultra-low-frequency (ULF) waves cover roughly the frequency range from 1 mHz to 1 Hz.

ELF and ULF signals are quite easily detected, but at times their source can be hard to determine.

The quake occurred in the Hokkaido area because no quake was going to occur in the Tokyo at that time. Take Care…Don in creepy town