A5068917911- Seismic Waves and Analysis
- Seismic Performance and Analysis
- earthquake and tectonic studies
- Structural Health Monitoring Techniques
- Seismic Imaging and Inversion Techniques
- Seismology and Earthquake Studies
- Geophysics and Sensor Technology
- Earthquake Detection and Analysis
- 3D Surveying and Cultural Heritage
- Masonry and Concrete Structural Analysis
- Geophysical Methods and Applications
- Structural Engineering and Vibration Analysis
- Acoustic Wave Phenomena Research
- Geotechnical Engineering and Underground Structures
- Structural Response to Dynamic Loads
- Building materials and conservation
- Marine and environmental studies
- Geophysical and Geoelectrical Methods
- Ultrasonics and Acoustic Wave Propagation
- Earthquake and Disaster Impact Studies
- Geophysics and Gravity Measurements
- Geological and Geophysical Studies Worldwide
- Rock Mechanics and Modeling
- Inertial Sensor and Navigation
- Underwater Acoustics Research
Institute of Engineering Seismology and Earthquake Engineering
2016-2025
Green Circle
2023
Aristotle University of Thessaloniki
2022
International Institute of Earthquake Engineering and Seismology
2016-2021
Earthquake Planning and Protection Organization
2014
The knowledge of the local soil structure is important for assessment seismic hazards. A widespread, but time-consuming technique to retrieve parameters underground drilling boreholes. Another way obtain shear wave velocity profile at a given location inversion surface dispersion curves. To ensure good resolution both superficial and deeper layers, used curves need cover wide frequency range. This range can be obtained using several arrays sensors or single array comprising large number...
The time-averaged shear-wave velocity in the upper 30 m of a site (V S30 ) is commonly used for ground-motion prediction.When measured velocities are unavailable, V estimated from proxy-based relationships developed application on global or local scales.We describe development relationship Greece, which begins with compilation profile database (PDB) published sources and engineering reports.The PDB contains 314 sites; 238 have depths ≥ 59 within 100 accelerographs.We find existing relations...
n a low‐seismicity context, the use of numerical simulations becomes essential due to lack representative earthquakes for empirical approaches. The goals EUROSEISTEST Verification and Validation Project (E2VP) are provide (1) quantitative analysis accuracy current, most advanced methods applied realistic 3D models sedimentary basins (verification) (2) comparison recorded ground motions with their predictions (validation). target is site located within Mygdonian basin, Greece. instrumented...
ABSTRACT Generalized inversion techniques (GITs) have become popular for determining seismological parameters (e.g., source, attenuation, and site response), particularly in low-to-moderate seismicity regions. Indeed, GITs can potentially provide reliable site-response estimates when a minimum number of recordings is available, as well valuable information about source regional attenuation characteristics. Significant advances been made on which different approaches hypotheses were...
ABSTRACT We study the applicability and limitations of single-station P-wave seismogram method for estimating VS30 by analyzing data from two accelerometer arrays in Greece. Although (and its variants) is usually applied at regional local networks using small earthquake (M 2–5), we employ a rather number stations (25) to validate against detailed geophysical models available these test sites. also examine downhole accelerometers, not considered similar studies. The results show systematic...
In high seismicity regions, one of the greatest risks to population safety is catastrophic impact earthquakes. Among critical societal infrastructures at risk are school buildings, which house both students and staff. earthquake-prone countries, enhancing preparedness schools address seismic essential. This effort raises two fundamental questions for authorities: (a) what most effective measures create earthquake-resilient schools? (b) How can civil protection agencies contribute achieving...
This study presents the site characterization of 133 selected stations in National Accelerometer Network Greece. All available earthquake recordings for various distances, magnitudes and azimuths around station are compiled processed to estimate a stable reliable average Horizontal -to-Vertical Spectral Ratio (eHVSR). The records used have magnitude range 4 &#8804; M < 6, with focal depth ranging from 0 40km hypocentral distances 12 km Rhyp 300&#160;km. Using Diffuse Filed Concept...
In Greece, almost all accelerometer stations provided recordings, more than 400 in total, are characterized by inferred Vs30 values based on combination of surface geology and slope proxy (Stewart et al. 2014). However, only about 15% them have been in-situ geophysical geotechnical methods (invasive or/and non-invasive) were performed at a distance less 100m from the station. addition, regarding reference rock where shear wave velocity is equal or greater 800m/sec (engineering bedrock), five...
SUMMARY We investigated the kinematic rupture model of 2018 Mw 6.8 Zakynthos, Ionian Sea (Greece), earthquake by using a non-linear joint inversion strong motion data, high-rate GPS time-series and static coseismic displacements. also tested results against tide-gauge recordings small tsunami generated in Sea. In order to constrain fault geometry, we performed several preliminary inversions assuming parameter values resulting from different published moment tensor solutions. The lowest cost...
Research Article| January 24, 2018 Accelerometer, Velocimeter Dense‐Array, and Rotation Sensor Datasets from the Sinaps@ Postseismic Survey (Cephalonia 2014–2015 Aftershock Sequence) Vincent Perron; Perron aFrench Alternative Energies Atomic Energy Commission (CEA), DEN, CEA Cadarache, DPIE/SA2S, Bât. 352, F‐13108 Saint‐Paul‐lez‐Durance, France, vincent.perron.mail@gmail.comkAlso at Université Grenoble Alpes, ISTerre, CNRS, IRD, IFSTTAR, F‐38041 Grenoble, France.lAlso Insitut de...
Abstract We compare different methods to estimate frequency‐domain amplification and duration lengthening of earthquake ground motion in the Mygdonian basin (Greece). Amplification is measured by standard spectral ratios (SSRs) horizontal component or single‐station horizontal‐to‐vertical (EHVRs). Duration either group delay method (Beauval et al. , 2003) labeled GDDL, based on significant (Trifunac Brady, 1975) TBDL. The are applied both high‐quality recordings European experimental site...
Abstract Strong ground motion records and free open access to strong-motion data repositories are fundamental inputs seismology, engineering soil dynamics, earthquake science practice. This article presents the current status outlook of Observatories Research Facilities for European Seismology (ORFEUS) coordinated seismology services, namely rapid raw (RRSM) (ESM) databases associated web interfaces webservices. We compare discuss role use these two systems using Mw 6.5 Norcia (Central...
Research Article| June 06, 2018 The ARGONET (Greece) Seismic Observatory: An Accelerometric Vertical Array and Its Data N. Theodoulidis; Theodoulidis aInstitute of Engineering Seismology Earthquake (ITSAK‐EPPO), Dassyliou Terma, Eleones, Pylea, GR 55535 Thessaloniki, Greece, ntheo@itsak.gr, kiriaki@itsak.gr Search for other works by this author on: GSW Google Scholar F. Hollender; Hollender bFrench Alternative Energies Atomic Energy Commission (CEA), DEN, CEA Cadarache, DPIE/SA2S, Bât. 352,...
Southeastern Europe faces a significant earthquake threat, endangering lives, property, and infrastructure thus jeopardizing sustainable development. The development of Rapid Earthquake Damage Assessment System (REDAS) designed to deliver crucial damage information for scenario planning, real-time response, bolstering public awareness preparedness is presented. In doing so, REDAS enhances community resilience safeguards sustainability. comprises platform (REDA.p), smartphone application, an...
The site effects of seismic motion in the metropolitan area city Thessaloniki (Northern Greece) are investigated using a 3-D finite-difference modelling approach. Three different scenarios assumed with two focal mechanisms for each one. Standard spectral ratios (SSR) calculated from synthetics and compared recorded motion, as well obtained 1-D 2-D by other researchers. average SSR curves six good agreement empirical ones, whereas results those modelling, exhibiting higher fundamental...
The development and application of a low-cost instrumentation system for seismic hazard assessment in urban areas are described the present study. comprises number autonomous triaxial accelerographs, designed manufactured house together with dedicated software device configuration, data collection further postprocessing. main objective is to produce detailed view strong motion variability areas, at least light intensity events. overall cost developed devices ten times lower than respective...