The Contribution of Near-Surface Geophysics for the Site Characterization of Seismological Stations
The Athenet network is the network of the Seismological Laboratory of the National and Kapodistrian University of Athens. We present the geophysical investigation that has been carried out at six seismological stations of the Athenet network for their site characterization. More specifically, at the...
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MDPI AG
2023-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/8/4932 |
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| author | John D. Alexopoulos Spyridon Dilalos Nicholas Voulgaris Vasileios Gkosios Ioannis-Konstantinos Giannopoulos Vasilis Kapetanidis George Kaviris |
| author_facet | John D. Alexopoulos Spyridon Dilalos Nicholas Voulgaris Vasileios Gkosios Ioannis-Konstantinos Giannopoulos Vasilis Kapetanidis George Kaviris |
| author_sort | John D. Alexopoulos |
| collection | DOAJ |
| description | The Athenet network is the network of the Seismological Laboratory of the National and Kapodistrian University of Athens. We present the geophysical investigation that has been carried out at six seismological stations of the Athenet network for their site characterization. More specifically, at the location of each seismological station, four geophysical methods have been carried out: Seismic Refraction Tomography (SRT), Multichannel Analysis of Surface Waves (MASW), the Horizontal to Vertical Spectral Ratio (HVSR) technique, and Electrical Resistivity Tomography (ERT). The applied geophysical survey provided important information regarding the site characterization at the selected seismological stations, including key parameters such as the fundamental frequency <i>f<sub>o</sub></i>, the shear-wave velocity <i>V<sub>S</sub></i>, the average shear-wave velocity for the upper 30 m depth (<i>V<sub>S30</sub></i>), the seismic bedrock depth, the soil type, and the subsurface geology. Moreover, selected elastic moduli (Poisson’s ratio, shear, bulk, and Young moduli) have been calculated. The site characterization information contributes to the determination of the amplification factors for each site that can lead to more accurate calculation of Peak Ground Acceleration (PGA) or Peak Ground Velocity (PGV) and, therefore, trustworthy Probabilistic and Stochastic Seismic Hazard Assessments. The derived fundamental frequency for the seismological stations of <i>VILL</i>, <i>LOUT</i>, <i>THAL</i>, and <i>EPID</i> have been determined to be equal to 10.4, 2.7, 1.4, and 7.1 Hz and their amplification factors to be 1.9, 3.1, 1.7, and 2.6, respectively. For stations <i>MDRA</i> and <i>ATAL</i>, these parameters could not be determined. |
| first_indexed | 2024-03-11T05:17:15Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T05:17:15Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-c8584ead2f624cfcb9f95b69866b79ce2023-11-17T18:11:22ZengMDPI AGApplied Sciences2076-34172023-04-01138493210.3390/app13084932The Contribution of Near-Surface Geophysics for the Site Characterization of Seismological StationsJohn D. Alexopoulos0Spyridon Dilalos1Nicholas Voulgaris2Vasileios Gkosios3Ioannis-Konstantinos Giannopoulos4Vasilis Kapetanidis5George Kaviris6Department of Geology and Geoenvironment, Section of Geophysics and Geothermy, National and Kapodistrian University of Athens, Panepistiomioupoli Zografou, 15784 Athens, GreeceDepartment of Geology and Geoenvironment, Section of Geophysics and Geothermy, National and Kapodistrian University of Athens, Panepistiomioupoli Zografou, 15784 Athens, GreeceDepartment of Geology and Geoenvironment, Section of Geophysics and Geothermy, National and Kapodistrian University of Athens, Panepistiomioupoli Zografou, 15784 Athens, GreeceDepartment of Geology and Geoenvironment, Section of Geophysics and Geothermy, National and Kapodistrian University of Athens, Panepistiomioupoli Zografou, 15784 Athens, GreeceDepartment of Geology and Geoenvironment, Section of Geophysics and Geothermy, National and Kapodistrian University of Athens, Panepistiomioupoli Zografou, 15784 Athens, GreeceDepartment of Geology and Geoenvironment, Section of Geophysics and Geothermy, National and Kapodistrian University of Athens, Panepistiomioupoli Zografou, 15784 Athens, GreeceDepartment of Geology and Geoenvironment, Section of Geophysics and Geothermy, National and Kapodistrian University of Athens, Panepistiomioupoli Zografou, 15784 Athens, GreeceThe Athenet network is the network of the Seismological Laboratory of the National and Kapodistrian University of Athens. We present the geophysical investigation that has been carried out at six seismological stations of the Athenet network for their site characterization. More specifically, at the location of each seismological station, four geophysical methods have been carried out: Seismic Refraction Tomography (SRT), Multichannel Analysis of Surface Waves (MASW), the Horizontal to Vertical Spectral Ratio (HVSR) technique, and Electrical Resistivity Tomography (ERT). The applied geophysical survey provided important information regarding the site characterization at the selected seismological stations, including key parameters such as the fundamental frequency <i>f<sub>o</sub></i>, the shear-wave velocity <i>V<sub>S</sub></i>, the average shear-wave velocity for the upper 30 m depth (<i>V<sub>S30</sub></i>), the seismic bedrock depth, the soil type, and the subsurface geology. Moreover, selected elastic moduli (Poisson’s ratio, shear, bulk, and Young moduli) have been calculated. The site characterization information contributes to the determination of the amplification factors for each site that can lead to more accurate calculation of Peak Ground Acceleration (PGA) or Peak Ground Velocity (PGV) and, therefore, trustworthy Probabilistic and Stochastic Seismic Hazard Assessments. The derived fundamental frequency for the seismological stations of <i>VILL</i>, <i>LOUT</i>, <i>THAL</i>, and <i>EPID</i> have been determined to be equal to 10.4, 2.7, 1.4, and 7.1 Hz and their amplification factors to be 1.9, 3.1, 1.7, and 2.6, respectively. For stations <i>MDRA</i> and <i>ATAL</i>, these parameters could not be determined.https://www.mdpi.com/2076-3417/13/8/4932SRTMASWERTHVSRelastic moduliV<sub>S30</sub> |
| spellingShingle | John D. Alexopoulos Spyridon Dilalos Nicholas Voulgaris Vasileios Gkosios Ioannis-Konstantinos Giannopoulos Vasilis Kapetanidis George Kaviris The Contribution of Near-Surface Geophysics for the Site Characterization of Seismological Stations Applied Sciences SRT MASW ERT HVSR elastic moduli V<sub>S30</sub> |
| title | The Contribution of Near-Surface Geophysics for the Site Characterization of Seismological Stations |
| title_full | The Contribution of Near-Surface Geophysics for the Site Characterization of Seismological Stations |
| title_fullStr | The Contribution of Near-Surface Geophysics for the Site Characterization of Seismological Stations |
| title_full_unstemmed | The Contribution of Near-Surface Geophysics for the Site Characterization of Seismological Stations |
| title_short | The Contribution of Near-Surface Geophysics for the Site Characterization of Seismological Stations |
| title_sort | contribution of near surface geophysics for the site characterization of seismological stations |
| topic | SRT MASW ERT HVSR elastic moduli V<sub>S30</sub> |
| url | https://www.mdpi.com/2076-3417/13/8/4932 |
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