Deterministic seismic hazard assessment of the inner town of Budapest
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Deterministic seismic hazard computations were performed along four different profiles across the downtown of Budapest. Synthetic seismograms were computed by the so called “hybrid technique”. By applying the hybrid technique it is possible to take into account the focal source, the path and the site effect together. Four independent computations have been performed using the same seismic source but different profiles. The parameters of the seismic source were adopted from the parameters of the well-known 1956 Dunaharaszti earthquake. The focal mechanism and the homogeneous and heterogeneous parts of the profiles are known from geophysical and geological data of the investigated area.
As the results of the computations PGA (peak ground acceleration) grid maps of the downtown of Budapest for the three different components came into existence. Furthermore spectral acceleration (response spectra, SA) and RSR charts of the synthetic seismograms for the four different profiles were created. The PGA grid maps show that the maximal PGA values are situated at the eastern (Pest) part of the downtown, and their values are 50–200 cm/s2.
For the downtown of Budapest a special seismic risk map have been prepared. This special seismic risk map were created on the basis of the difference between the maximal amplitude frequencies of SA of synthetic seismograms and the building’s eigenfrequencies at every 0.1 km2 of the downtown. In order to determine the building’s eigenfrequencies microseismic noise measurement were performed at 6 different buildings in the downtown. The special seismic risk map shows that the buildings situated at the hilly western section of the downtown have higher seismic risk than the ones at the flat eastern part.
Keywordsdeterministic seismic hazard computation Geographical Information System (GIS) hybrid technique seismic microzonation seismic risk
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- Bisztricsány E 1974: Earthquake engineering (in Hungarian). Akadémiai Kiadó, Budapest Bus Z, Szeidovitz Gy, Vaccari F 2000: Pure Appl. Geophys., 157, 203–219.Google Scholar
- Dövényi P, Palotai M, Hámori Z, Bíró L, Tóth T, Surányi G 2008: Geological structure of the inner town of Budapest and the geological-geophysical model of the northen part of Csepel island (in Hungarian). Final Report, Geological Exploration and Environmental Research Ltd.Google Scholar
- Fäh D, Suhadolc P, Panza G F 1990: In: Proceedings of the 9th European Conference of Earthquake Engineering, Moscow 4A, 100–109.Google Scholar
- Fäh D, Suhadolc P, Mueller St, Panza G F 1994: Bull. Seism. Soc. Am., 84, 383–397.Google Scholar
- Gusev A A 1983: Geophys. J. R. Astron. Soc., 74, 787–808.Google Scholar
- Panza G F 1985: J. Geophys., 58, 125–145.Google Scholar
- Panza G F, Suhadolc P 1987: In: Seismic Srong Motion Synthetics. B A Bolt ed., Computational Techniques 4, Academic Press, Orlando, 153–204.Google Scholar
- Panza G F, Romanelli F, Vaccari F 2000: Advances Geoph., 43, 1–95.Google Scholar
- Panza G F, Herak M, Paskaleva I, Radulian M, Romanelli F, Vaccari F et al. 2002: Episodes, 25, No. 3, 160–184.Google Scholar
- Szeidovitz Gy 1986: Acta Geod. Geoph. Hung., 21, 109–127.Google Scholar
- Tóth L, Győri E, Mónus P, Zsíros T 2006: In: The Adria Microplate: GPS Geodesy, Tectonics, and Hazards. N Pinter, Gy Grenerczy, J Weber, S Stein, D Medak eds, Springer Verlag, NATO ARW Series, 61, 369–384.Google Scholar
- Tóth L, Mónus P, Szeidovitz Gy, Bus Z 2008: Seismic hazard of the inner town of Budapest, Probabilistic seismic hazard assessment (in Hungarian). Final Report, MTA GGKI Szeizmológiai Főosztály Archívuma, GGRI Seismological Department of HASGoogle Scholar
- Varga P, Gribovszki K, Győri E, Bus Z 2009: Deterministic seismic hazard assessment of the inner town of Budapest (in Hungarian). Final Report, GGRI Seismological Department of HASGoogle Scholar