What is the Earth's natural resonant frequency?

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Discussion Overview

The discussion revolves around the concept of the Earth's natural resonant frequency, exploring whether such a frequency exists and what it entails. Participants consider different types of resonances, including electromagnetic and mass resonant modes, and reference historical attempts to detect gravitational waves.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • Some participants question whether the Earth has a natural resonant frequency and what that might mean.
  • One participant suggests that if referring to mass resonant modes, there are several predicted modes derived from geophysical and earthquake data.
  • A specific low frequency Earth resonant mode of about one every 54 minutes is mentioned, linked to historical attempts by Joseph Weber and Robert Forward to use it in gravitational wave detection.
  • Another participant shares a link to a webpage that may provide additional information on the topic.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the existence or nature of the Earth's natural resonant frequency, with multiple viewpoints and uncertainties expressed.

Contextual Notes

The discussion includes assumptions about the definitions of resonant frequencies and the types of resonances being considered, which may not be fully clarified.

mapa
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(Is there one?) What is the Earth's natural resonant frequency?
 
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mapa said:
(Is there one?) What is the Earth's natural resonant frequency?

Hmm..
I will assume you are not referring to the Electromagnetic resonance, usually referred to a Schumann resonances (in which there is an abundance of available info).

If you are referring to the Earth's natural mass resonant modes, I believe there are several, (which are predicted and derived mostly from geophysical and earthquake data).

Not commonly known is the fact that there is a low frequency Earth resonant mode of about one every 54 minutes,... that Joseph Weber (and Robert Forward) tried to use in Gravitational wave detection using very sensitive gravimeters (long long time ago in a distant land ;))...before deciding to build the resonant (aluminum) bar detectors.

Creator
 
mapa said:
(Is there one?) What is the Earth's natural resonant frequency?

I just found a web page called http://icb.u-bourgogne.fr/nano/MANAPI/saviot/terre/index.en.html"
 
Last edited by a moderator:
Thank You.
 

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