Dr. George PAPATHANASSIOU
PhD Geologist, MSc. In Applied and Environmental Geology
Department of GEOLOGY, Aristotle University of Thessaloniki
Date of birth: 23/10/1973
Address: Navarinou Sq. 18, 54622, Thessaloniki
Phone: +30-2310246128 / 6944430466
Web site gpapatha.weebly.com
PhD in Soil Liquefaction, Dept of Geology, Aristotle University of Thessaloniki. Thesis subject: “Liquefaction phenomena in Greece triggered by earthquakes”.
Scholarship of Greek State Scholarships Foundation (duration 3 years)
Scholarship of Research Committee, A.U.TH. (Duration: 12 months)
Researcher License of ministry of Environment, Physical Planning and Public Works, categories 20 & 27
MSc. in Applied and Environmental Geology. Degree: 8,86.
BSc in Geology, Aristotle University of Thessaloniki.
Visiting student under the Erasmus program in the Brunel University, London, UK.
Teaching of lecture “Natural hazards” at the Dept of Geotechnology and Environment , Technological Institute of Kozani (Greece)
Teaching of laboratory tests of the module “Soil and Rock Mechanics” of the Dept of Geology, Aristotle University of Thessaloniki,
French: High level - Eppreuve d’etudes, Sorbonne I, 1992
Certificat de fin d’etudes, 1989
Spanish Intermediate level- Diploma de Espanol como Lengua Extranjera (Basico), 2003
English Intermediate level
A list of publications can be found here
The h-index is equal to 5 (of the 17 documents considered for the h index, 5 have been cited at least 5 times) and the articles have been cited more than 35 times according to the database of Scopus.
In Quaternary International, Engineering Geology, Journal of Geotechnical and Geoenvironmental Engineering / ASCE, Canadian Geotechnical Journal, Soil dynamics and Earthquake engineering
Right after the start of my scientific career and during my Master degree and PhD, I have worked as a research scientist at the laboratory of Engineering Geology and Hydrogeology of the Aristotle University of Thessaloniki. The main research results of mt work are presented in the PhD thesis and the publications in peer reviewed journals, where I was the chief researcher. The following activities could be regarded as four of the major accomplishments of the applicant:
· Liquefaction-induced deformation in Aegean broader region
The goal of this research was to investigate the appearance of liquefaction phenomena in the broader Aegean region and to propose new empirical relationships correlating the earthquake magnitude with the epicentral distance of the liquefied site. In order to achieve these goals, I have collected historical and seismotectonic data from the broader Aegean region that are relevant to liquefaction phenomena. These liquefaction cases histories have been triggered by 88 earthquakes since 1509. The proposed correlations were only based on data reported to the instrumental era (after 1900), providing an accurate and reliable tool for the liquefaction hazard assessment. The lower earthquake magnitude that induced liquefaction in the study area is Ms=5.0, while the upper limit is Ms=7.6. Furthermore, the closest distance of the liquefied sites to the causative faults was estimated in order to determine a distance – magnitude relation based on normal fault data. In addition, regressions of Re on Ms, have been proposed according to the focal mechanism of the event. Moreover, a web GIS-based database of liquefaction manifestations within this area is developed, providing significant information regarding the parameters of the triggering mechanism and the type of ground failure (http://users.auth.gr/~gpapatha/Dalo.htm) .
· Liquefaction hazard mapping
I have performed several studies for the classification of degree of severity of liquefaction-induced ground disruption based on the value of liquefaction potential index (LPI). The advantage of LPI is that quantifies the likely of liquefaction of the site, by providing a unique value for the entire soil column instead of several factors of safety per layer. Therefore, the values of LPI are used for the compilation of liquefaction hazard maps. These maps comprise a preliminary assessing tool of the liquefaction potential and can be used by decision makers for urban planning. In order to achieve this, the liquefaction potential index of borings with SPT, conducted at liquefied and non – liquefied sites in Taiwan, in Turkey and in Greece, was calculated. Afterwards the computed LPI values were correlated with the type and the severity of liquefaction-induced surface effects using the box-whisker plot method. Additionally, a LPI-based probability equation of liquefaction surface disruption was assessed using logistic regression analysis while a discriminant function was defined for classifying sites as liquefiable or not, based on the LPI value and the thickness of the non-liquefiable cap layer of the soil column.
· Evaluating the macroseismic intensity based on earthquake-induced environmental effects.
The seismic intensity is used to estimate the level of the ground shaking based on descriptions of the effects that were triggered by the earthquake. In countries with well documented reports, concerning historical seismicity, the distribution of the intensity can help scientists to estimate the locations and sizes of earthquakes that occurred before the instrumental period thus assess the seismic hazard of the area. However, the last decade, the evaluation of intensity was mainly based on structural damages and the environmental effects were underestimated, leading to a differentially estimation of the size of an earthquake that occurred in two regions where the building stock is comprised by old and modern structures, respectively and creating an error in the assessment of the seismic hazard analysis of the region. In order to avoid this inaccuracy, a scale based solely on earthquake environmental effects that can be used in combination with other scales was developed by the INQUA Subcommision on Paleoseismicity. Dr. Papathanassiou is one of the researchers working on this project in Greece. Until now, two past events were selected as case studies for the application of this scale in Greece. The results of his work can be found in conference proceedings and in a peer review journal, Quaternary International. Furthermore, Dr. Papathanassiou was invited to present the results of the application of the scale in Greece at the Workshop ‘Conduct of Seismic Hazard Analyses for Critical Facilities’, May 2006, Trieste.
· Evaluation of rock fall potential in mountainous areas in Greece
After the PhD submission, research activities and work undertaken by George focused on the evaluation of landslide hazard and particularly the assessment of rock fall potential. He was the main author in published papers dealing with the computation of the most important parameter of a rock fall trajectory such as the kinetic energy and the bounce height and he used an existed methodology in order to evaluate the earthquake-induced rockfall hazard in a mountainous area in Greece. The outcome of this study was compared with the observations and reports provided by a post earthquake reconnaissance filed survey.