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 Geophones


The word "geophone" is a homonym for "earth" or "sound," and that is exactly what the equipment looks for—acoustic vibrations within the Earth. To enable safe geothermal operations, the sensors gather extensive data sets that provide details about underground geothermal reservoirs and how the reservoir rock is changing prior to, during, and after EGS stimulations. Geophones can be placed in wells or at the surface, putting them nearer geothermal reservoirs where they can gather more precise data. In geothermal situations, high rock strengths, corrosive brine ingredients, and extreme temperatures render conventional seismic monitoring instruments ineffective. Additionally, the cost of producing parts and tools for geothermal conditions can be prohibitive due to the current U.S. geothermal market's relatively small size.



A geophone functions by converting ground movement into a voltage that a microcontroller can quickly read. Geophysicists and seismologists have employed geophones as ground motion transducers to transform ground movement into voltage. The seismic response, which is used to examine the structure of the earth, is defined as any variation in the recorded voltage from the baseline. The most important component of a geophone is its resonance frequency, which must be low to measure low-frequency transmissions. On the other hand, a geophone needs to have a large bandwidth in order to record high-frequency signals. However, the majority of the geophones that are now on the market have mechanical springs that reduce the device's performance.


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