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ARS Home » Southeast Area » Oxford, Mississippi » National Sedimentation Laboratory » Watershed Physical Processes Research » Research » Publications at this Location » Publication #394658
Research Project: Acoustic and Geophysical Methods for Multi-Scale Measurements of Soil and Water Resources

Location: Watershed Physical Processes Research

Title: Correct tilt calculation for atmospheric presure-induced seismic noise

Author
item RASPET, RICHARD - University Of Mississippi
item HICKEY, CRAIG - University Of Mississippi
item KOIRALA, BIPIN - University Of Mississippi

Submitted to: Applied Sciences
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/20/2022
Publication Date: 1/25/2022
Citation: Raspet, R., Hickey, C., Koirala, B. 2022. Correct tilt calculation for atmospheric presure-induced seismic noise. Applied Sciences. 12(3):1247. https://doi.org/10.3390/app12031247.
DOI: https://doi.org/10.3390/app12031247

Interpretive Summary: In a literature search on the coupling of wind-generated pressure fluctuations into seismic noise, it was noticed that the expression for the angular tilt induced by pressure fluctuations in the seminal paper “A preliminary investigation into the relationship between long-period seismic noise and local fluctuations in the atmospheric pressure” by G. G. Sorrells was only valid at the surface. A search of the literature which cites the Sorrells paper was performed to see if any subsequent research corrected this error, and what effect the error might have on the research. A recent paper by Tanimoto and Wang notes the correct expression for the tilt, but employs the simpler erroneous expression in the research. This paper establishes the correct method for predicting the horizontal displacements from atmospheric pressure fluctuations at low frequencies. Future work to establish soil properties from seismic measurements may entail measurements at greater depths and lower frequencies which will be beneficial to stakeholders interested in agrogeophyical field measurements affected by wind-generated pressure fluctuations in soil.

Technical Abstract: In a literature search on the coupling of wind-generated pressure fluctuations into seismic noise, it was noticed that the expression for the angular tilt induced by pressure fluctuations in the seminal paper “A preliminary investigation into the relationship between long-period seismic noise and local fluctuations in the atmospheric pressure” by G. G. Sorrells was only valid at the surface. A search of the literature which cites the Sorrells paper was performed to see if any subsequent research corrected this error, and what effect the error might have on the research. A recent paper by Tanimoto and Wang notes the correct expression for the tilt, but employs the simpler erroneous expression in the research. In this paper, we develop the correct expression for effective measured displacements and approximate expressions analogous to those of Sorrells. The resulting magnitudes and decay with depth are then displayed and compared to Sorrells. Next, the results of the literature search are discussed. The results of three papers are identified as potentially modified by the correction of the tilt calculation. Finally, it is noted that the majority of the papers referenced are not affected by the correction, since many of the papers are for near-surface displacements of very low frequencies.