Fluctuation dynamics in geoelectrical data: an investigation by using multifractal detrended fluctuation analysis

被引：60
|
作者：
Telesca, L
Colangelo, G
Lapenna, V
Macchiato, M
机构：
[1] CNR, Ist Metodol Anal Ambientale, I-85050 Tito, PZ, Italy
[2] Univ Naples Federico II, Dipartimento Sci Fis, INFM, Naples, Italy
来源：
PHYSICS LETTERS A | 2004年 / 332卷 / 5-6期
关键词：
geoelectrical signal; multifractal detrended fluctuation analysis;
D O I：
10.1016/j.physleta.2004.10.011
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We analyzed fluctuations in the time dynamics of nonstationary geoelectrical data, recorded in a seismic area of southern Italy, by means of the multifractal detrended fluctuation analysis (MF-DFA). The multifractal character of the signal depends mostly on the different long-range properties for small and large fluctuations. The time variation of indices, denoting the departure from monofractal behaviour, reveals an enhancement of the multifractality of the signal prior seismic occurrences. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：398 / 404
页数：7
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