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Environmental Effects on Broadband Seismic Noise: A Year-Long Assessment from Maitri Station, Dronning Maud Land, East Antarctica.

Saha S, Biswas R, Kumar P.

SEISMOLOGICAL RESEARCH LETTERS

https://doi.org/10.1785/0220250219 

India's Maitri seismic station in East Antarctica recorded exceptionally low background noise throughout 2023, performing well within global quality standards. Noise levels varied predictably with seasons rising in summer due to reduced sea ice and field activity, and quieting in winter. These findings confirm Maitri as a reliable, high-fidelity observatory capable of detecting subtle ground motion and monitoring Antarctica's changing ice and ocean environment year-round.

Seismic noise characteristics of Maitri seismic station in East Antarctica: (a) location of Maitri station on the Antarctic continent, (b) annual probabilistic power spectral density distribution for the vertical component, and (c) seasonal variation of background seismic noise during 2023.

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