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Investigating the time-clustering properties in seismicity of Umbria–Marche region (central Italy)

✍ Scribed by Luciano Telesca; Vincenzo Lapenna; Maria Macchiato

Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
289 KB
Volume
18
Category
Article
ISSN
0960-0779

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✦ Synopsis

We investigated by fractal tools the temporal patterns of 1996-1999 seismicity of the Umbria-Marche region, central Italy, that was struck by a strong event ðM S ¼ 5:9Þ on September 26, 1997. Clustering behaviour has been evidenced by using different fractal tools, Fano factor analysis, Allan factor analysis and detrended fluctuation analysis, that show power-law shaped statistics, whose scaling exponents describe the degree of clusterization in the earthquake sequence. Furthermore, the scaling exponents evolve in time showing an increase of the clustering features in correspondence to larger events.

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