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Planetary Laser Interferometric Seismoacoustic Observatory.

Grigory Dolgikh1, Sergey Budrin1, Stanislav Dolgikh1

  • 1V.I. Il'ichev Pacific Oceanological Institute FEB RAS, 690041 Vladivostok, Russia.

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Summary

A new planetary laser interferometric seismoacoustic observatory can pinpoint infrasound disturbance origins globally. This system identifies signal divergence and energy loss during propagation, enhancing seismic and acoustic monitoring capabilities.

Keywords:
absorption coefficientdivergencelaser strainmetersplanetary observatorytriangulation

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Area of Science:

  • Geophysics
  • Acoustics
  • Laser Interferometry

Background:

  • Seismoacoustic monitoring relies on detecting and locating disturbances.
  • Planetary-scale infrasound detection presents significant challenges in signal localization and characterization.

Purpose of the Study:

  • To describe the development and capabilities of a planetary laser interferometric seismoacoustic observatory.
  • To establish methods for direction finding and signal analysis of infrasound disturbances at planetary distances.

Main Methods:

  • Utilizing a network of six stationary laser strainmeters with unequal arms.
  • Employing triangulation methods for direction finding of infrasound disturbances.
  • Integrating a high-precision timing system (TRIMBLE 5700) for synchronized measurements.

Main Results:

  • Developed fundamental methods for direction finding of infrasound disturbances at any planetary distance.
  • Demonstrated the capability to determine signal divergence and energy loss during propagation using spatially separated strainmeters.
  • Achieved displacement recording accuracy of 10 pm within a 0-1000 Hz frequency range.

Conclusions:

  • The established planetary laser interferometric seismoacoustic observatory can determine the primary source of deformation infrasound disturbances globally.
  • The system enables detailed analysis of signal characteristics, including divergence and energy attenuation.
  • This observatory enhances capabilities for monitoring and understanding planetary-scale seismoacoustic phenomena.