Site Component—k<sub>0</sub> and Its Correlation to V<sub>S30</sub> and the Site Fundamental Frequencies for Stations Installed in N. Macedonia
This study focuses on determining the high-frequency decay parameter kappa (k) and its site component (k<sub>0</sub>) for sixteen accelerometric stations installed in suitable locations in North Macedonia. Kappa characterizes the attenuation of ground motion at high frequencies, describi...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-05-01
|
| Series: | Geotechnics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-7094/5/2/35 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850168532923318272 |
|---|---|
| author | Marina Poposka Davor Stanko Dragi Dojchinovski |
| author_facet | Marina Poposka Davor Stanko Dragi Dojchinovski |
| author_sort | Marina Poposka |
| collection | DOAJ |
| description | This study focuses on determining the high-frequency decay parameter kappa (k) and its site component (k<sub>0</sub>) for sixteen accelerometric stations installed in suitable locations in North Macedonia. Kappa characterizes the attenuation of ground motion at high frequencies, describing the decrease in the acceleration amplitude spectrum. It is defined using a regression line in log-linear space, starting from the point where the S-wave amplitude spectrum begins to decay rapidly. The site characteristics of the stations are determined through geophysical and borehole investigations, as well as HVSR mean curves derived from earthquake data. The strong-motion data used in this analysis originate from earthquake events with a moment magnitude greater than 3 (M<sub>W</sub> > 3), an epicentral distance less than 120 km (R<sub>epi</sub> < 120 km), and a focal depth lower than 30 km (h < 30 km). The records undergo visual inspection and filtering, with those having a signal-to-noise ratio (SNR) below 3 excluded from further analysis. The study examines the correlation between kappa values and various parameters, including magnitude, epicentral distance, average shear-wave velocity in the top 30 m depth (V<sub>S30</sub>), and fundamental site frequency (f<sub>0</sub>). The importance of this study is the application in the future evaluation/update of seismic hazard analysis of the region. |
| format | Article |
| id | doaj-art-3699ee5ae0b34580807fd65bb5e67a89 |
| institution | OA Journals |
| issn | 2673-7094 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Geotechnics |
| spelling | doaj-art-3699ee5ae0b34580807fd65bb5e67a892025-08-20T02:20:57ZengMDPI AGGeotechnics2673-70942025-05-01523510.3390/geotechnics5020035Site Component—k<sub>0</sub> and Its Correlation to V<sub>S30</sub> and the Site Fundamental Frequencies for Stations Installed in N. MacedoniaMarina Poposka0Davor Stanko1Dragi Dojchinovski2Ss. Cyril and Methodius University in Skopje, Institute of Earthquake Engineering and Engineering Seismology, 1000 Skopje, North MacedoniaUniversity of Zagreb, Faculty of Geotechnical Engineering, 42000 Varaždin, CroatiaSs. Cyril and Methodius University in Skopje, Institute of Earthquake Engineering and Engineering Seismology, 1000 Skopje, North MacedoniaThis study focuses on determining the high-frequency decay parameter kappa (k) and its site component (k<sub>0</sub>) for sixteen accelerometric stations installed in suitable locations in North Macedonia. Kappa characterizes the attenuation of ground motion at high frequencies, describing the decrease in the acceleration amplitude spectrum. It is defined using a regression line in log-linear space, starting from the point where the S-wave amplitude spectrum begins to decay rapidly. The site characteristics of the stations are determined through geophysical and borehole investigations, as well as HVSR mean curves derived from earthquake data. The strong-motion data used in this analysis originate from earthquake events with a moment magnitude greater than 3 (M<sub>W</sub> > 3), an epicentral distance less than 120 km (R<sub>epi</sub> < 120 km), and a focal depth lower than 30 km (h < 30 km). The records undergo visual inspection and filtering, with those having a signal-to-noise ratio (SNR) below 3 excluded from further analysis. The study examines the correlation between kappa values and various parameters, including magnitude, epicentral distance, average shear-wave velocity in the top 30 m depth (V<sub>S30</sub>), and fundamental site frequency (f<sub>0</sub>). The importance of this study is the application in the future evaluation/update of seismic hazard analysis of the region.https://www.mdpi.com/2673-7094/5/2/35attenuationkappaFASnear-surface attenuationstrong motion data |
| spellingShingle | Marina Poposka Davor Stanko Dragi Dojchinovski Site Component—k<sub>0</sub> and Its Correlation to V<sub>S30</sub> and the Site Fundamental Frequencies for Stations Installed in N. Macedonia Geotechnics attenuation kappa FAS near-surface attenuation strong motion data |
| title | Site Component—k<sub>0</sub> and Its Correlation to V<sub>S30</sub> and the Site Fundamental Frequencies for Stations Installed in N. Macedonia |
| title_full | Site Component—k<sub>0</sub> and Its Correlation to V<sub>S30</sub> and the Site Fundamental Frequencies for Stations Installed in N. Macedonia |
| title_fullStr | Site Component—k<sub>0</sub> and Its Correlation to V<sub>S30</sub> and the Site Fundamental Frequencies for Stations Installed in N. Macedonia |
| title_full_unstemmed | Site Component—k<sub>0</sub> and Its Correlation to V<sub>S30</sub> and the Site Fundamental Frequencies for Stations Installed in N. Macedonia |
| title_short | Site Component—k<sub>0</sub> and Its Correlation to V<sub>S30</sub> and the Site Fundamental Frequencies for Stations Installed in N. Macedonia |
| title_sort | site component k sub 0 sub and its correlation to v sub s30 sub and the site fundamental frequencies for stations installed in n macedonia |
| topic | attenuation kappa FAS near-surface attenuation strong motion data |
| url | https://www.mdpi.com/2673-7094/5/2/35 |
| work_keys_str_mv | AT marinapoposka sitecomponentksub0subanditscorrelationtovsubs30subandthesitefundamentalfrequenciesforstationsinstalledinnmacedonia AT davorstanko sitecomponentksub0subanditscorrelationtovsubs30subandthesitefundamentalfrequenciesforstationsinstalledinnmacedonia AT dragidojchinovski sitecomponentksub0subanditscorrelationtovsubs30subandthesitefundamentalfrequenciesforstationsinstalledinnmacedonia |