Affiliation:
1. Department of Geology and Geoenvironment, Section of Geophysics and Geothermy, National and Kapodistrian University of Athens, Panepistiomioupoli Zografou, 15784 Athens, Greece
Abstract
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 fo, the shear-wave velocity VS, the average shear-wave velocity for the upper 30 m depth (VS30), 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 VILL, LOUT, THAL, and EPID 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 MDRA and ATAL, these parameters could not be determined.
Funder
HELPOS-Hellenic System for Lithosphere Monitoring
Reinforcement of the Research and Innovation Infrastructure
Operational Programme “Competitiveness, Entrepreneurship and Innovation”
Greece and the European Union
Subject
Fluid Flow and Transfer Processes,Computer Science Applications,Process Chemistry and Technology,General Engineering,Instrumentation,General Materials Science
Reference82 articles.
1. University of Athens (2023, March 20). Hellenic Seismological Network, University of Athens, Seismological Laboratory [Data set]. International Federation of Digital Seismograph Networks. Available online: https://www.fdsn.org/networks/detail/HA/.
2. Seismic Waveform Data from Greece and Cyprus: Integration, Archival, and Open Access;Evangelidis;Seismol. Res. Lett.,2021
3. National Observatory of Athens, Institute of Geodynamics, Athens (2023, March 20). National Observatory of Athens Seismic Network [Data Set]. International Federation of Digital Seismograph Networks. Available online: https://www.fdsn.org/networks/detail/HL/.
4. Aristotle University of Thessaloniki (2023, March 20). Aristotle University of Thessaloniki Seismological Network [Data Set]. International Federation of Digital Seismograph Networks. Available online: https://www.fdsn.org/networks/detail/HT/.
5. University of Patras (2023, March 20). University of Patras, Seismological Laboratory [Data Set]. International Federation of Digital Seismograph Networks. Available online: https://www.fdsn.org/networks/detail/HP/.