eprintid: 1548 rev_number: 16 eprint_status: archive userid: 2 dir: disk0/00/00/15/48 datestamp: 2015-02-23 08:20:46 lastmod: 2017-02-08 12:21:36 status_changed: 2015-04-27 12:11:06 type: article metadata_visibility: show creators_name: Kijko, Andrzej corp_creators: Institute of Geophysics, Polish Academy of Sciences, 00-973 Warsaw, P. O. Box 155, Pasteura 3 title: A modified form of the first Gumbel distribution: model for the occurrence of large earthquakes. Part II - Estimation of parameters ispublished: pub subjects: MP2_2 subjects: MP3_1 divisions: EPOS-P full_text_status: none abstract: In the first part of this paper (Kijko, 1982), the following cumulative distribution function for magnitudes of the largest earthquakes in a certain interval of time, was proposed: G(x)=exp[-λ((A2-A(x))/(A2-A1))] for Mmin<=x<=Mmax and G(x)=1 for x>Mmax, where A(x)=exp (-βx), A1=exp(-βMmin), and A2=exp(-βMmax). Mmin is the treshold magnitude, Mmax is the maximum regional value, and the parameters β, λ and Mmax have been determined. In this paper the formulas for the parameters β, λ and Mmax are derived following the maximum likelihood and moments principles. As an example, the proposed distribution and formulas are applied to five seismic regions. date: 1983 date_type: published publication: Acta Geophysica Polonica volume: 31 number: 2 publisher: Polish Academy of Science pagerange: 147-159 refereed: TRUE issn: 1895-6572 access_IS-EPOS: limited owner: Publisher citation: Kijko, Andrzej (1983) A modified form of the first Gumbel distribution: model for the occurrence of large earthquakes. Part II - Estimation of parameters. Acta Geophysica Polonica, 31 (2). pp. 147-159.