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Conference Paper

Ambient noise characterization in the Eastern Dharwar Craton, southern India: Analysis of broadband seismic stations in Hyderabad network

Authors

Saha,  Satish
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Biswas,  Rahul
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Mandal,  Prantik
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Vengala,  Pavan Kumar
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Dixith,  M. Sai
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Prasad,  B. Nagavara
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Saha, S., Biswas, R., Mandal, P., Vengala, P. K., Dixith, M. S., Prasad, B. N. (2023): Ambient noise characterization in the Eastern Dharwar Craton, southern India: Analysis of broadband seismic stations in Hyderabad network, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4884


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021286
Abstract
The ambient noise analysis has been performed at ten newly installed broadband seismic stations of the Eastern Dharwar Craton in Telangana, India. We have calculated the power spectral densities (PSDs) and their corresponding probability density functions (PDFs) using different types of noise to assess the seismic station's performance. One year of continuous data from January 2021 to December 2021 was used for the analysis. The results suggest that all station's observed vertical noise levels are within the defined global noise limits. In the short-period band, the stations are dominated by cultural noise due to human activities, industrial machinery, automobile traffic, etc., which also causes a substantial variation between day and night hours. The vertical component lies above the new low-noise model (NLNM) at the long-period band. Due to the tilt effect, the horizontal components marginally overshoot the new high-noise model (NHNM). An assessment of the noise variation was also performed during the partial lockdown due to COVID-19 in 2021 imposed by the Telangana state Government in India, revealing minor variations in short-period noise levels. Overall, our estimation suggests stability and validates the performance of all the installed stations of the Eastern Dharwar Craton in Telangana state.