Gauging sediment thickness in a seismically prone city in the context of the recent 6.4 M Assam earthquake
This work reports estimation of sediment thickness in a seismically prone city, namely Tezpur of Northeast, India via ambient noise measurements. Accordingly, a three-component broadband sensor was used to accrue ambient noise at seventy various locations of Tezpur. Estimation of resonance frequenci...
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| Language: | English |
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Elsevier
2025-12-01
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| Series: | Results in Earth Sciences |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2211714825000615 |
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| author | Rajib Biswas Nilutpal Bora |
| author_facet | Rajib Biswas Nilutpal Bora |
| author_sort | Rajib Biswas |
| collection | DOAJ |
| description | This work reports estimation of sediment thickness in a seismically prone city, namely Tezpur of Northeast, India via ambient noise measurements. Accordingly, a three-component broadband sensor was used to accrue ambient noise at seventy various locations of Tezpur. Estimation of resonance frequencies has been done from horizontal to vertical spectral ratios. Via as estimated resonance frequencies and available borehole feed, an empirical power law has been formulated which allows for boarder mapping of sediment thickness. The results indicate a predominance of lateral heterogeneity in the area under study. Apart from that, estimates of VS hint at diverse soil types existing in this region. All these inputs can be of help for geotechnical engineers as well as policy makers to foster earthquake resilience in the context of the recent 2021 6.4 MW earthquake whose epicenter was very nearby to the study area. |
| format | Article |
| id | doaj-art-f45b8c8d35e446cfbdc9d684d044ecf9 |
| institution | Matheson Library |
| issn | 2211-7148 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Earth Sciences |
| spelling | doaj-art-f45b8c8d35e446cfbdc9d684d044ecf92025-07-29T04:12:30ZengElsevierResults in Earth Sciences2211-71482025-12-013100119Gauging sediment thickness in a seismically prone city in the context of the recent 6.4 M Assam earthquakeRajib Biswas0Nilutpal Bora1Corresponding author.; Geophysics Lab, Department of Physics, Tezpur University, Tezpur 784028, IndiaGeophysics Lab, Department of Physics, Tezpur University, Tezpur 784028, IndiaThis work reports estimation of sediment thickness in a seismically prone city, namely Tezpur of Northeast, India via ambient noise measurements. Accordingly, a three-component broadband sensor was used to accrue ambient noise at seventy various locations of Tezpur. Estimation of resonance frequencies has been done from horizontal to vertical spectral ratios. Via as estimated resonance frequencies and available borehole feed, an empirical power law has been formulated which allows for boarder mapping of sediment thickness. The results indicate a predominance of lateral heterogeneity in the area under study. Apart from that, estimates of VS hint at diverse soil types existing in this region. All these inputs can be of help for geotechnical engineers as well as policy makers to foster earthquake resilience in the context of the recent 2021 6.4 MW earthquake whose epicenter was very nearby to the study area.http://www.sciencedirect.com/science/article/pii/S2211714825000615Ambient noiseH/VSite responseResonance frequency |
| spellingShingle | Rajib Biswas Nilutpal Bora Gauging sediment thickness in a seismically prone city in the context of the recent 6.4 M Assam earthquake Results in Earth Sciences Ambient noise H/V Site response Resonance frequency |
| title | Gauging sediment thickness in a seismically prone city in the context of the recent 6.4 M Assam earthquake |
| title_full | Gauging sediment thickness in a seismically prone city in the context of the recent 6.4 M Assam earthquake |
| title_fullStr | Gauging sediment thickness in a seismically prone city in the context of the recent 6.4 M Assam earthquake |
| title_full_unstemmed | Gauging sediment thickness in a seismically prone city in the context of the recent 6.4 M Assam earthquake |
| title_short | Gauging sediment thickness in a seismically prone city in the context of the recent 6.4 M Assam earthquake |
| title_sort | gauging sediment thickness in a seismically prone city in the context of the recent 6 4 m assam earthquake |
| topic | Ambient noise H/V Site response Resonance frequency |
| url | http://www.sciencedirect.com/science/article/pii/S2211714825000615 |
| work_keys_str_mv | AT rajibbiswas gaugingsedimentthicknessinaseismicallypronecityinthecontextoftherecent64massamearthquake AT nilutpalbora gaugingsedimentthicknessinaseismicallypronecityinthecontextoftherecent64massamearthquake |