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Non‐uniform scaling features in central Italy seismicity: A non‐linear approach in investigating seismic patterns and detection of possible earthquake precursors
Author(s) -
Telesca Luciano,
Lovallo Michele
Publication year - 2009
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2008gl036247
Subject(s) - induced seismicity , detrended fluctuation analysis , scaling , seismology , context (archaeology) , geology , power law , scaling law , instability , geophysics , statistical physics , physics , mathematics , statistics , geometry , mechanics , paleontology
The detrended fluctuation analysis (DFA) is a powerful method for capturing scaling behavior in nonstationary time series. Using an appropriate instability index, it is possible to identify and quantify deviations from uniform power‐law scaling, which suggest the presence of changing dynamics in the system under study. In this context, the scaling behavior of the 1981–2007 seismicity in Umbria‐Marche (central Italy), which is one of the most seismically active areas in Italy, was investigated. Significant deviations from uniform power‐law scaling in the seismic temporal fluctuations were revealed mostly linked with the occurrence of rather large earthquakes or seismic clusters.