# 3.1 - Sferics

 Between 1978 and 1979, special frequency measurements took place in Pfaffenhofen by Baumer and Sölling. With a narrow bandwidth (2 kHz), the frequencies from 10 and 27 kHz were continuously recorded to 10 and 27 kHz by a reception facility. The range of the receiver was limited to 400-500 km. This led to the discovery of the Sferics, which are also known as weather frequencies:
 4150.84 Hz 6226.26 Hz 8301.26 Hz 10377.10 Hz 12452.52 Hz 28018.17 Hz 49810.08 Hz See also "Das natürliche elektromagnetische Impuls-Spektrum der Atmosphäre" 1982 from Baumer and Eichmeier and in "Sferics" page 285, 1987 from Hans Baumer

 The Sferic basic frequency is 4150.84 Hz. The other frequencies represent only harmonics, are therefore harmonic ratios to the sferic basic frequency. A prime factorization with regard to the two basic frequencies of the earth is used as follows:

 Equator radius 4150.84 : 11.75 = 353.263 » 353 = Prime Polar radius 4150.84 : 11.79 = 352.064 » 352 352 = 11 · 32 = 11 · 25

 The back calculation for the Sferics proves:

 For the Equator radius: 11.75 · 11 · 25 = 4136.27 Hz For the Polar radius: 11.79 · 11 · 25 = 4150.19 Hz

 he equatorial radius has a difference of 14.57 Hz to the sferic basic frequency. The polar radius has a difference of 0.65 Hz to the sferic basic frequency. The sferic basic frequency is used as a reference to define the earth basic fre-quency: 4150.84 : 352 = 11.79215909 = corrected basic frequency

 3.1.1 - Definition: f0 = 11.7921591 Hz = Earth basic frequency

 3.1.2 - Theorem: The sferic basic frequency is the 5th octave of the 10th harmonic of the earth basic frequency.