Detecting seasonal differences in high-frequency site response using κ0
Near-surface geologic site conditions significantly affect seismic waves by amplifying certain frequency ranges and attenuating others. For seismic hazard analysis, site conditions are assumed to be constant over time. Contrary to this assumption, temporal variations in near-surface velocities...
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| Language: | English |
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McGill University
2025-06-01
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| Series: | Seismica |
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| Online Access: | https://seismica.library.mcgill.ca/article/view/1425 |
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| _version_ | 1849469694401052672 |
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| author | Annabel Händel Marco Pilz Luca C. Malatesta David Litwin Fabrice Cotton |
| author_facet | Annabel Händel Marco Pilz Luca C. Malatesta David Litwin Fabrice Cotton |
| author_sort | Annabel Händel |
| collection | DOAJ |
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Near-surface geologic site conditions significantly affect seismic waves by amplifying certain frequency ranges and attenuating others. For seismic hazard analysis, site conditions are assumed to be constant over time. Contrary to this assumption, temporal variations in near-surface velocities have been observed in recent years. This study shows for the first time that ∆κ0, the site component of the spec- tral decay parameter κ derived between a surface and a borehole sensor, can vary seasonally. ∆κ0 is an integrative parameter of local site attenuation and amplification at high frequencies. Using data from the Kiban Kyoshin Strong Motion Network (KiK-net) in Japan, we analyze recordings of seismic events between 2004–2020 and correlate temporal ∆κ0 variations with environmental factors such as temperature, precipi- tation, snow depth, soil moisture, and terrestrial water storage. We can identify strong seasonal variations at 13 sites in northeastern Hokkaido and on Honshu, with ∆κ0 being generally larger in winter than in summer. Our results indicate that the high-frequency site response can be influenced by environmental conditions and should not be assumed to be constant
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| format | Article |
| id | doaj-art-7c9988c38c1740ccade7a4c834ea9492 |
| institution | Kabale University |
| issn | 2816-9387 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | McGill University |
| record_format | Article |
| series | Seismica |
| spelling | doaj-art-7c9988c38c1740ccade7a4c834ea94922025-08-20T03:25:23ZengMcGill UniversitySeismica2816-93872025-06-014110.26443/seismica.v4i1.1425Detecting seasonal differences in high-frequency site response using κ0Annabel Händel0Marco Pilz1Luca C. Malatesta2David Litwin3Fabrice Cotton4 GFZ Helmholtz Centre for Geosciences, Potsdam, Germany GFZ Helmholtz Centre for Geosciences, Potsdam, Germany GFZ Helmholtz Centre for Geosciences, Potsdam, Germany GFZ Helmholtz Centre for Geosciences, Potsdam, GermanyInstitute of Geosciences, University of Potsdam, Potsdam, Germany Near-surface geologic site conditions significantly affect seismic waves by amplifying certain frequency ranges and attenuating others. For seismic hazard analysis, site conditions are assumed to be constant over time. Contrary to this assumption, temporal variations in near-surface velocities have been observed in recent years. This study shows for the first time that ∆κ0, the site component of the spec- tral decay parameter κ derived between a surface and a borehole sensor, can vary seasonally. ∆κ0 is an integrative parameter of local site attenuation and amplification at high frequencies. Using data from the Kiban Kyoshin Strong Motion Network (KiK-net) in Japan, we analyze recordings of seismic events between 2004–2020 and correlate temporal ∆κ0 variations with environmental factors such as temperature, precipi- tation, snow depth, soil moisture, and terrestrial water storage. We can identify strong seasonal variations at 13 sites in northeastern Hokkaido and on Honshu, with ∆κ0 being generally larger in winter than in summer. Our results indicate that the high-frequency site response can be influenced by environmental conditions and should not be assumed to be constant https://seismica.library.mcgill.ca/article/view/1425site characterizationtemporal variationsEarthquake ground motion |
| spellingShingle | Annabel Händel Marco Pilz Luca C. Malatesta David Litwin Fabrice Cotton Detecting seasonal differences in high-frequency site response using κ0 Seismica site characterization temporal variations Earthquake ground motion |
| title | Detecting seasonal differences in high-frequency site response using κ0 |
| title_full | Detecting seasonal differences in high-frequency site response using κ0 |
| title_fullStr | Detecting seasonal differences in high-frequency site response using κ0 |
| title_full_unstemmed | Detecting seasonal differences in high-frequency site response using κ0 |
| title_short | Detecting seasonal differences in high-frequency site response using κ0 |
| title_sort | detecting seasonal differences in high frequency site response using κ0 |
| topic | site characterization temporal variations Earthquake ground motion |
| url | https://seismica.library.mcgill.ca/article/view/1425 |
| work_keys_str_mv | AT annabelhandel detectingseasonaldifferencesinhighfrequencysiteresponseusingk0 AT marcopilz detectingseasonaldifferencesinhighfrequencysiteresponseusingk0 AT lucacmalatesta detectingseasonaldifferencesinhighfrequencysiteresponseusingk0 AT davidlitwin detectingseasonaldifferencesinhighfrequencysiteresponseusingk0 AT fabricecotton detectingseasonaldifferencesinhighfrequencysiteresponseusingk0 |