It seems there may be something to the ear tones - here is a communication someone else I know got from a Russian Scientist: Unfortunately I don't think my friend has the influence to get this equipment into any areas that would be beneficial.

Here's an example of why we need earth scientists that are doing active research involved here. With this kind of thing we could finally prove/disprove ear tones rather than saying they are a figment or just coincidental. (Petra - if you feel you could help get this stuff deployed, e-mail me and i'll send the details of how to contact this guy and where this came from)

>Subject: New means for Earthquake prediction
>
>Dear Sirs,
>
>My colleagues and I study non linear seismic effects. In particular we
>study natural and induced acoustic noises in the upper part of the
>Earth's crust. As a result these work we have found that underground
>acoustic noise carries a solid information about dynamical processes in
>the Earth's crust. We have an unique sensor and method of record given
>for long unceasing observing an underground acoustic noise in initial
>part of the sound range of frequencies. If and when You want to observe
>an underground acoustic noise in interests of forecast of earthquakes,
>we can install our unique instruments in your country. Russian
>instruments have mountain-high sensitivity and can be installed in bore
>holes of different depth, in mines or in caves (pit), getting into ledge
>rocks for a long-term observations. If this you interest, details in the
>attached file risked2.doc.
>
>Best regards, Askold Belyakov
>
>Dr. Askold Belyakov
>Head Scientist
>Institute of the Physics of Earth UIPE RAS
>B.Gruzinskaya 10, 123995 Moscow Russia