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Title: CHARACTERISTICS OF FOREIGN EARTHQUAKES IMPACT RECORDED ON SOUTHWESTERN BULGARIAN TERRITORY
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CHARACTERISTICS OF FOREIGN EARTHQUAKES IMPACT RECORDED ON SOUTHWESTERN BULGARIAN TERRITORY
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1314-2704
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English
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18
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5.1
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It is well-known that earthquakes do not consider boundaries and Bulgaria is also subjected to seismic impacts from earthquake sources located in the neighbouring countries, i.e. outside its territory. Without doubt the actual impact from these sources on our built environment is to be taken into account by our engineers and planners. This could be done properly if only based on instrumental records of real events and after assessment of their characteristics. The effect of Vrancea quakes on our territory is rather well studied, recognized and included in our seismic codes, too. But there isn?t enough accumulated information of similar kind for southern Bulgaria. The subject in this study are earthquake records on our territory caused by foreign seismic sources near our boundaries that strike mainly southwestern part of Bulgaria.
In the last decade foreign quakes? impact on our territory have also been thoroughly recorded by the digital stations of the National Strong Ground Motion Network of Bulgaria. Thus a collection of accelerograms is accumulated. Its analysis and assessment of the local impact is essential for earthquake research/engineering and prevention purposes of the building sites in SW Bulgaria. Thus indicative records of the last 10 years are selected for this study. Processed data, relevant to the aseismic design of structures, for representative recording spots in southwestren Bulgaria is extracted and discussed. Evaluation, comparison and assessment of the real dynamic impact on our territory of a number of latest foregn seismic sources? quakes with M = (4.9 ? 5.3) is submitted, accounting for the difference in earthquake inputs: source mechanism, amount of energy released, seismic waves? travel path, distance to hypocentre, local geology etc. The results obtained here give an opportunity for researchers and earthquake engineers to work in an adequate, updated environment, i.e. considering the latest actual seismic action of foreign earthquakes on sites in SW Bulgaria and thus contribute to seismic risk reduction in our country. |
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conference
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18th International Multidisciplinary Scientific GeoConference SGEM 2018
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18th International Multidisciplinary Scientific GeoConference SGEM 2018, 02-08 July, 2018
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Proceedings Paper
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STEF92 Technology
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International Multidisciplinary Scientific GeoConference-SGEM
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Bulgarian Acad Sci; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Russian Acad Sci; Serbian Acad Sci & Arts; Slovak Acad Sci; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; World Acad Sci; European Acad Sci, Arts & Letters; Ac
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167-174
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02-08 July, 2018
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website
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cdrom
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1313
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SGM Monitoring; Spectral Analysis; Dynamic Structural Response
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