Peculiarities of the HVSR Method Application to Seismic Records Obtained by Ocean-Bottom Seismographs in the Arctic
The application of the horizontal-to-vertical spectral ratio (HVSR) modeling and inversion techniques is becoming more and more widespread for assessing the seismic response and velocity model of soil deposits due to their effectiveness, environmental friendliness, relative simplicity and low cost....
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ftmdpi:oai:mdpi.com:/2076-3417/12/19/9576/ 2023-08-20T04:04:31+02:00 Peculiarities of the HVSR Method Application to Seismic Records Obtained by Ocean-Bottom Seismographs in the Arctic Artem A. Krylov Mikhail E. Kulikov Sergey A. Kovachev Igor P. Medvedev Leopold I. Lobkovsky Igor P. Semiletov agris 2022-09-23 application/pdf https://doi.org/10.3390/app12199576 EN eng Multidisciplinary Digital Publishing Institute Civil Engineering https://dx.doi.org/10.3390/app12199576 https://creativecommons.org/licenses/by/4.0/ Applied Sciences; Volume 12; Issue 19; Pages: 9576 site-specific analysis earthquake response seafloor seismic noise HVSR modeling HVSR inversion seafloor soils ocean-bottom seismographs submarine permafrost gravity waves infragravity waves Text 2022 ftmdpi https://doi.org/10.3390/app12199576 2023-08-01T06:36:21Z The application of the horizontal-to-vertical spectral ratio (HVSR) modeling and inversion techniques is becoming more and more widespread for assessing the seismic response and velocity model of soil deposits due to their effectiveness, environmental friendliness, relative simplicity and low cost. Nevertheless, a number of issues related to the use of these techniques in difficult natural conditions, such as in the shelf areas of the Arctic seas, where the critical structures are also designed, remain poorly understood. In this paper, we describe the features of applying the HVSR modeling and inversion techniques to seismic records obtained by ocean-bottom seismographs (OBS) on the outer shelf of the Laptev Sea. This region is characterized by high seismotectonic activity, as well as sparse submarine permafrost distribution and the massive release of bubble methane from bottom sediments. The seismic stations were installed for one year and their period of operation included periods of time when the sea was covered with ice and when the sea was ice-free. The results of processing of the recorded ambient seismic noise, as well as the wave recorder data and ERA5 and EUMETSAT reanalysis data, showed a strong dependence of seafloor seismic noise on the presence of sea ice cover, as well as weather conditions, wind speed in particular. Wind-generated gravity waves, as well as infragravity waves, are responsible for the increase in the level of ambient seismic noise. The high-frequency range of 5 Hz and above is strongly affected by the coupling effect, which in turn also depends on wind-generated gravity waves and infragravity waves. The described seafloor seismic noise features must be taken into account during HVSR modeling and interpretation. The obtained HVSR curves plotted from the records of one of the OBSs revealed a resonant peak corresponding to 3 Hz, while the curves plotted from the records of another OBS did not show clear resonance peaks in the representative frequency range. Since both OBSs were located ... Text Arctic Ice laptev Laptev Sea permafrost Sea ice MDPI Open Access Publishing Arctic Laptev Sea Applied Sciences 12 19 9576 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
site-specific analysis earthquake response seafloor seismic noise HVSR modeling HVSR inversion seafloor soils ocean-bottom seismographs submarine permafrost gravity waves infragravity waves |
spellingShingle |
site-specific analysis earthquake response seafloor seismic noise HVSR modeling HVSR inversion seafloor soils ocean-bottom seismographs submarine permafrost gravity waves infragravity waves Artem A. Krylov Mikhail E. Kulikov Sergey A. Kovachev Igor P. Medvedev Leopold I. Lobkovsky Igor P. Semiletov Peculiarities of the HVSR Method Application to Seismic Records Obtained by Ocean-Bottom Seismographs in the Arctic |
topic_facet |
site-specific analysis earthquake response seafloor seismic noise HVSR modeling HVSR inversion seafloor soils ocean-bottom seismographs submarine permafrost gravity waves infragravity waves |
description |
The application of the horizontal-to-vertical spectral ratio (HVSR) modeling and inversion techniques is becoming more and more widespread for assessing the seismic response and velocity model of soil deposits due to their effectiveness, environmental friendliness, relative simplicity and low cost. Nevertheless, a number of issues related to the use of these techniques in difficult natural conditions, such as in the shelf areas of the Arctic seas, where the critical structures are also designed, remain poorly understood. In this paper, we describe the features of applying the HVSR modeling and inversion techniques to seismic records obtained by ocean-bottom seismographs (OBS) on the outer shelf of the Laptev Sea. This region is characterized by high seismotectonic activity, as well as sparse submarine permafrost distribution and the massive release of bubble methane from bottom sediments. The seismic stations were installed for one year and their period of operation included periods of time when the sea was covered with ice and when the sea was ice-free. The results of processing of the recorded ambient seismic noise, as well as the wave recorder data and ERA5 and EUMETSAT reanalysis data, showed a strong dependence of seafloor seismic noise on the presence of sea ice cover, as well as weather conditions, wind speed in particular. Wind-generated gravity waves, as well as infragravity waves, are responsible for the increase in the level of ambient seismic noise. The high-frequency range of 5 Hz and above is strongly affected by the coupling effect, which in turn also depends on wind-generated gravity waves and infragravity waves. The described seafloor seismic noise features must be taken into account during HVSR modeling and interpretation. The obtained HVSR curves plotted from the records of one of the OBSs revealed a resonant peak corresponding to 3 Hz, while the curves plotted from the records of another OBS did not show clear resonance peaks in the representative frequency range. Since both OBSs were located ... |
format |
Text |
author |
Artem A. Krylov Mikhail E. Kulikov Sergey A. Kovachev Igor P. Medvedev Leopold I. Lobkovsky Igor P. Semiletov |
author_facet |
Artem A. Krylov Mikhail E. Kulikov Sergey A. Kovachev Igor P. Medvedev Leopold I. Lobkovsky Igor P. Semiletov |
author_sort |
Artem A. Krylov |
title |
Peculiarities of the HVSR Method Application to Seismic Records Obtained by Ocean-Bottom Seismographs in the Arctic |
title_short |
Peculiarities of the HVSR Method Application to Seismic Records Obtained by Ocean-Bottom Seismographs in the Arctic |
title_full |
Peculiarities of the HVSR Method Application to Seismic Records Obtained by Ocean-Bottom Seismographs in the Arctic |
title_fullStr |
Peculiarities of the HVSR Method Application to Seismic Records Obtained by Ocean-Bottom Seismographs in the Arctic |
title_full_unstemmed |
Peculiarities of the HVSR Method Application to Seismic Records Obtained by Ocean-Bottom Seismographs in the Arctic |
title_sort |
peculiarities of the hvsr method application to seismic records obtained by ocean-bottom seismographs in the arctic |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/app12199576 |
op_coverage |
agris |
geographic |
Arctic Laptev Sea |
geographic_facet |
Arctic Laptev Sea |
genre |
Arctic Ice laptev Laptev Sea permafrost Sea ice |
genre_facet |
Arctic Ice laptev Laptev Sea permafrost Sea ice |
op_source |
Applied Sciences; Volume 12; Issue 19; Pages: 9576 |
op_relation |
Civil Engineering https://dx.doi.org/10.3390/app12199576 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/app12199576 |
container_title |
Applied Sciences |
container_volume |
12 |
container_issue |
19 |
container_start_page |
9576 |
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1774714903129489408 |