Towards Realizing the TPU

[allcanadian]

I think the most important aspect here relates to teslas magnetometer, that is "what" it was measuring and not how it was measured.
Regards
AC

[Mannix]

Perhaps Tesla was near some power lines and never realised to significance of them..LOL

[BEP]

I think the most important information, other than what he was measuring, are the distances. Multiples of about 50 miles? The equipment registered again and again at these points of distance to the storm.

Now, if Tesla was writing about things as (I perceive) he saw them, then figure that distance along with his idea of the speed of light and you have the frequency of nodes for his compression waves. Consider these waves as not going below zero, in amplitude. So, the lowest density points are ambient or zero.

Since electromagnetic compression waves do exist in waveguides (like the chamber between Earth and the Ionosphere) it is highly possible he was measuring the magnetic ripple caused by lightning strikes.

Resonance and high Q for a coil designed for this type of wave (travelling compression - not travelling wave) should not be hard to achieve. Is that a Tesla flavor non-inductive flat spiral coil in that photo?

[sparks]

   A cloud to earth lightning strike acts just like a spark gap.  An electrostatic potential causes ionization of a column of molecules or (leader) which grows between earth and cloud.  The free electrons now form a coherent field of negative plasma between cloud and ground.  The wire now being formed shorts the capacitor and a huge amount of current flows across the spark gap.  The current between Earth and the clouds leaves the portion of the Earth where the strike hit positively charged relative to the rest of the Earth field.  This positively charged unipole expands rapidly in the conductor field of the Earth.  Causing atoms in the Earth to shift their electric dipole moments in response to the changing dielectric field about them.  This electric dipole moment alignment is directly related to the magnetic dipole moments of the atoms depending on the atomic structure of the mass encountered.  The magnetic field shift lags the electrical  wave front depending on the neuclear magnetic response of the atoms in question.  The Earth in the near field of the lightning strike is also acting as an anode and free electrons are being drawn towards the strike zone.  This often results in electronic flow oscillating in the plasma field between cloud and earth at extemely high frequencys.  This causes the Earth pole to oscillate in charge and associated electric wave fronts to be issued.  The Earth acting as a broadband receiver and it's inductive response returning a magnetic wave.

[wings]

   A cloud to earth lightning strike acts just like a spark gap.  An electrostatic potential causes ionization of a column of molecules or (leader) which grows between earth and cloud.  The free electrons now form a coherent field of negative plasma between cloud and ground.  The wire now being formed shorts the capacitor and a huge amount of current flows across the spark gap.  The current between Earth and the clouds leaves the portion of the Earth where the strike hit positively charged relative to the rest of the Earth field.  This positively charged unipole expands rapidly in the conductor field of the Earth.  Causing atoms in the Earth to shift their electric dipole moments in response to the changing dielectric field about them.  This electric dipole moment alignment is directly related to the magnetic dipole moments of the atoms depending on the atomic structure of the mass encountered.  The magnetic field shift lags the electrical  wave front depending on the neuclear magnetic response of the atoms in question.  The Earth in the near field of the lightning strike is also acting as an anode and free electrons are being drawn towards the strike zone.  This often results in electronic flow oscillating in the plasma field between cloud and earth at extemely high frequencys.  This causes the Earth pole to oscillate in charge and associated electric wave fronts to be issued.  The Earth acting as a broadband receiver and it's inductive response returning a magnetic wave.

his sound ?

http://www-pw.physics.uiowa.edu/space-audio/sounds/EarthWhistlers/ewhist.html