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  • Articles  (4)
  • TERESA project  (4)
  • 1985-1989  (4)
  • 1950-1954
  • Geography  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Seismic hazard computations for regions with low earthquake activity — A case study for the Belgium, The Netherlands and NW Germany area (1989)
    Springer
    Natural hazards 2 (1989), S. 229-236 
    Details
    ISSN: 1573-0840
    Keywords: TERESA project ; seismic hazard ; comparison of algorithms ; low earthquake activity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract The algorithms to evaluate seismic hazard, used and/or developed by five teams participating in the TERESA project, applied to the low seismicity area ‘Belgium, The Netherlands and NW Germany’ are compared. The main differences in the results can be explained by the majority criterion of Egozcue et al. (1989), the differences in the upper bound and zonification and, in some cases, by a higher attenuation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00127314
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Assessment of seismic hazard for the Sannio-Matese area of Southern Italy — A summary (1989)
    Springer
    Natural hazards 2 (1989), S. 217-228 
    Details
    ISSN: 1573-0840
    Keywords: Seismic hazard ; Sannio-Matese ; TERESA project ; European Seismological Commission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract The working group on ‘Test Regions for Evaluation of Methods for Seismic Hazard Assessment in Europe (TERESA)’, consisted of 15 members from 10 different European countries. Methods and experience gathered in these countries have been compared and discussed for two test areas in Europe: the Sannio-Matese region, Southern Italy, with high seismic activity, and the border region between Belgium, The Netherlands, and Federal Republic of Germany, with low activity. This paper summarizes the results for one of the test areas, Sannio-Matese. Most of the participants used statistical procedures to assess earthquake hazard, receiving results in terms of probability of occurrence for intensity as the ground-motion parameter. It was found that careful preparation of input data and parameters is the major influencing factor, therefore most of the efforts of the working group was devoted to this task. The scatter of the obtained results of the group is considerable, mainly because of the uncertainties in the data and the subjectiveness involved in the procedures. For better control of both factors, more objective methods have to be developed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00127313
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Seismic hazard assessment in TERESA test areas based on a Bayesian technique (1989)
    Springer
    Natural hazards 2 (1989), S. 249-265 
    Details
    ISSN: 1573-0840
    Keywords: Bayesian method ; seismic hazard uncertainty ; Sannio-Matese ; northern Rhine region ; TERESA project
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract A method based on Bayesian techniques has been applied to evaluate the seismic hazard in the two test areas selected by the participants in the ESC/SC8-TERESA project: Sannio-Matese in Italy and the northern Rhine region (BGN). A prior site occurrence model (prior SOM) is obtain from a seismicity distribution modeled in wide seismic sources. The posterior occurrence model (posterior SOM) is calculated after a Bayesian correction which, basically, recovers the spatial information of the epicenter distribution and considers attenuation and location errors, not using source zones. The uncertainties of the occurrence probabilities are evaluated in both models. The results are displayed in terms of probability and variation coefficient contour maps for a chosen intensity level, and with plots of mean return period versus intensity in selected test sites, including the 90% probability intervals. It turns out that the posterior SOM gives a better resolution in the probability estimate, decreasing its uncertainty, especially in low seismic activity regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00127316
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  • 4
    Electronic Resource
    Electronic Resource
    Analysis of input data and seismic hazard assessment for the low seismicity area ‘Belgium, The Netherlands and NW Germany’ (1989)
    Springer
    Natural hazards 2 (1989), S. 349-362 
    Details
    ISSN: 1573-0840
    Keywords: TERESA project ; seismic hazard assessment ; Belgium ; The Netherlands ; NW Germany ; catalogue analysis ; seismotectonic zones ; zone parameters ; uncertainties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geography , Geosciences
    Notes: Abstract From the earthquake catalogue of the region of interest 2–8°E, 49–52°N, only events with intensity 〉 3 are considered. The fore/aftershocks and the induced seismicity are removed. The completeness and other properties of the remaining data set are investigated. The seismic data, as well as the geological, tectonic, and other geophysical data of the area are used for the determination of the seismotectonic zones. For each zone, the cumulative intensity-frequency relation (taking into account the completeness of the catalogue), the attenuation depending on the direction, the upper bound of intensity and the average depth are calculated. When the seismic activity is changing within a zone, this zone is divided into subzones with an almost constant activity and a b value equal to the value of the whole zone. When necessary for each subzone, a different attenuation coefficient can be used, to take into account more regional effects. Then the seismic hazard is assessed with the modified McGuire program. Annual probability versus intensity for several sites and hazard intensity and probability maps are calculated. Finally, an error discussion of the whole procedure for one test site is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00127321
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