Frequency Atlas

Atmospheric sferics, 4150.84 Hz (Baumer/Cousto)

4,150.84 Hz

A figure reported for radio pulses from lightning. Cousto links it to the rotation of the Earth; the link is a musical fourth, and approximate.

How well is this supported?

SpeculativeIdea, not a measurement

A claim that has not been established. Evidence is missing, weak, or limited to small studies.

This entry describes an idea, not a measurement.

What the four labels meanChecked against sources September 27, 2026

About this number

Sferics are radio pulses from lightning. They are broadband, with most of their energy near 5 kHz. Hans Baumer reported that sferics recorded at Pfaffenhofen an der Ilm, Germany, cluster at particular frequencies, 4150.84 Hz among them. Hans Cousto relates that figure to the rotation of the Earth: it lies a musical fourth above an octave of the sidereal-day tone, to within 0.73 parts in a thousand. It is not an octave of the day tone. The figure comes from Cousto’s book and a printing-trade bulletin. This site did not find it in a peer-reviewed paper.

Facts

Frequency
4,150.84 Hz
Wavelength (electromagnetic wave)
72.2 km
Refers to
A musical fourth above an octave of the sidereal-day tone, within 0.73 parts in a thousand (Cousto)
Kind of statement
Idea, not a measurement
Filed under
Earth, Moon & Sun

Sources

  • Hans Cousto — The Cosmic Octave

    The book that sets out the method of octave doubling. Cited as the source of Cousto’s claims, not as evidence for them.

    Hans Cousto, Die kosmische Oktave (Synthesis Verlag, Essen, 1984). English edition: The Cosmic Octave (LifeRhythm, Mendocino, 1988).

Related entries