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Space-magnitude dependent scaling behaviour in seismic interevent series revealed by detrended fluctuation analysis

✍ Scribed by Luciano Telesca; Michele Lovallo; Vincenzo Lapenna; Maria Macchiato

Publisher: Elsevier Science
Year: 2008
Tongue: English
Weight: 462 KB
Volume: 387
Category: Article
ISSN: 0378-4371
DOI: 10.1016/j.physa.2008.02.035

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✦ Synopsis

The scaling behaviour of the 1981-2007 seismicity data in central Italy, which is one of the most seismically active areas in Italy is investigated. In particular we examined the earthquakes located in a circular area centred on the epicentre of the strongest event, occurred in September 26, 1997 (duration magnitude M D = 5.8). On the base of the detrended fluctuation analysis (DFA), we found that in the magnitude range between 2.5 and 2.9 the scaling exponents fall into disjoint sets for events relatively close and far from the epicentre of the strongest event.

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The Umbria-Marche region (central Italy) is one of the most seismically active area of Italian Peninsula, and recently it was characterized by the intense earthquake (M ¼ 5:9) occurred on September 26, 1997. We analyzed the time-scaling properties of the seismicity of the area during the 1997-1998 s