Seismic risk of Lower Danube Euroregion: Cahul and Cantemir districts (Moldova) case study
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2024-01-14 12:53
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ALCAZ, Vasile, ISICICO, Eugen. Seismic risk of Lower Danube Euroregion: Cahul and Cantemir districts (Moldova) case study. In: Environmental Challenges in Lower Danube Euroregion, 25-26 iunie 2015, Galaţi. Cluj-Napoca, România: Casa Cărţii de Ştiinţă, 2015, p. 17.
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Environmental Challenges in Lower Danube Euroregion 2015
Conferința "Environmental Challenges in Lower Danube Euroregion"
Galaţi, Romania, 25-26 iunie 2015

Seismic risk of Lower Danube Euroregion: Cahul and Cantemir districts (Moldova) case study


Pag. 17-17

Alcaz Vasile, Isicico Eugen
 
Institute of Geology and Seismology, ASM
 
Proiecte:
 
Disponibil în IBN: 12 iulie 2020


Rezumat

The problem of natural hazard risk assessment and management is a very vital and important for each country. At present many countries are experiencing an increasing number of natural hazards with a corresponding unacceptable increase in social and economic losses. Moldova, Romania and Ukraine are prone to the disasters. Particularly, the territory of Lower Danube Euroregion is characterized by high level of seismic hazard (7-9 MSK intensities) coming mostly from Vrancea subcrustal intermediate earthquake source. Generally, the risk is defined as convolution of the earthquake hazard H and buildings vulnerability V: R = H * V (1) It is well known that the methods of risk assessment are scale-dependent. Short-, Mid- and Long-term may indicate time scales of 1, 50 and 100 years respectively. In the present paper the earthquake risk was determined in the long-term sense. According to this, the design seismic action (earthquake scenario) was selected the Vrancea earthquake of 10.11.1940 with approximately 100 years return period and magnitude Mw = 7.7. For the specified earthquake scenario special macroseismic attenuation equation was elaborated. This allowed us to obtain the probable distribution of the intensity in the Lower Danube Euroregion study area. Knowing the distribution of seismic intensity buildings stock, and its vulnerability we can calculate the risk of damage. In the present study seismic risk was calculated as the average degree of damage and the number of destroyed buildings within each locality of two test districts having the highest seismic risk and belonging to the Lower Danube Euroregion, namely Cahul and Cantemir. It stands to reason that this approach can be applied to the whole territory of the Lower Danube Euroregion.