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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-24 23:08 |
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Conference: Bucharest University Faculty of Physics 2018 Meeting
Section: Atmosphere and Earth Science; Environment Protection
Title:
Assessment of seismic hazard in landslides
Authors:
Liliana-Irina Stanciu (Stoian)(1,2)
*
Affiliation:
1) Geological Survey of Romania
2) University of Bucharest Faculty of Physics
E-mail
airinsweety@yahoo.com
Keywords:
seismic hazard, landlides, risk, vunerability
Abstract:
The seismic hazard expresses the Earth's deformation characteristics, and the seismic risk expresses material destruction and loss of human lives.
Seismic hazard assessment represents the first step in any seismic risk analysis being an essential step in reducing earthquake risk and improving management in disaster prevention. For a given perimeter, the correct assessment of seismic hazard is the first step in antiseismic design, which is the only way to reduce material losses and human lives. In general, the study of a seismogenic area involves at least two major issues: (i) assessing its intrinsic characteristics (spatial distribution of outbreaks, maximum magnitude, repletion of a seismic phenomenon); (ii) area distribution of effects. The general process for determining the seismic hazard, for any location, encompasses the following: (i) geological, seismological, geophysical and geotechnical investigations on site; (ii) a probability analysis of seismic hazard (PSHA); (iii) an analysis of the site's local response to see local geological effects; (iv) selecting the working methodology and the performance to be achieved Romania is affected by earthquakes with epicenter in the Vrancea area. Here there are seism at a depth of 50-200 km, with great energy and destructive character, felt on stretched areas, having magnitudes of 7-7.5and energy that ranges between 1022 - 1023 ergi. The earthquakes in Vrancea, determined for the seismicity of the territory of Romania, both through their occurrence frequency and through their magnitudes imposed on the general attention from ancient times through their destructive effects and by the few important features that give them a special place in all the earthquakes that rock our planet. The most important information on the Earth's internal structure results from deciphering and understanding seismic messages, general seismicity of the Earth and nevertheless the distribution of earthquakes.
References:
Gh. Marmureanu.Ed.Academia Romana,2016, Certitudini/Incertitudini in evaluarea hazardului si a riscului seismic vrancean
Constantinescu,L.,Enescu,D.(1985).Cutremurele din Vrancea în cadru ştiinţific şi tehnologic, Editura Academiei Române;
Radulian,M.,Mândrescu,N.,Popescu,E.,Utale,A.,Panza,G.(2000).Characterization of Romanian seismic zones,PAGEOPH,
Săndulescu, M.(1984).Geotectonica României, Ed.Tehnică.
Mândrescu N. (1981). The Romanian earthquake of March 4, 1977: aspects of soil behaviour, Rev.Roum.Geol.,Geogr., Geophysique
Cloetingh,Sierd and the ISES team(2007).Coupled deep lithosphere and surface deformation during the post-collisional evolution of the Pannonian-Carpathians system: modes of basin and orogen (de)formation, lithospheric strength and vertical motions,Bucharest, SFB 461-Strong Earthquakes. A Chalange for geosciences and Civil Engineerin.
Acknowledgement:
This work was supported by Prof.Dr. Gheorghe Marmureanu from the University of Bucharest Faculty of Physics.
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