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Statistical analysis of seismicity and hazard estimation for Italy (mixed approach). Statistical parameters of main shocks and aftershocks in the Italian region

机译：意大利地震活动性和危险性估算的统计分析（混合方法）。意大利地区主震和余震的统计参数

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The catalog of earthquakes of Italy (1900-1993) is analyzed. The following problems have been considered: (1) a choice of the operating magnitude, (2) an analysis of data completeness, and (3) a grouping (in time and in space). The catalog has been separated into main shocks and aftershocks. Statistical estimations of seismicity parameters (a,b) are performed for the seismogenetic zones defined by GNDT. The non-standard elements of the analysis performed are: (a) statistical estimation and comparison of seismicity parameters under the condition of arbitrary data grouping in magnitude, time and space; (b) use of an unconventional statistical method for the aftershock identification; the method is based on the idea of optimizing two kinds of errors in the aftershock identification process; and (c) use of the aftershock zones to reveal seismically-interrelated seismogenic zones. This procedure contributes to the stability of the estimation of the 'b-value.' refs., 25 figs., tabs. (Atomindex citation 26:044505)

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