Abbreviated Journal Title
Nonlinear Process Geophys.
Keywords
SCALE UNIVERSAL MULTIFRACTALS; CHAOS GAME REPRESENTATION; RAINFALL; TIME-SERIES; D-ST INDEX; COMPLEX NETWORKS; STORM EVENTS; SIMULATION; PREDICTION; SEQUENCES; CLOUDS; Geochemistry & Geophysics; Meteorology & Atmospheric Sciences
Abstract
The multifractal properties of the daily solar X-ray brightness, X-l and X-s, during the period from 1 January 1986 to 31 December 2007 which includes two solar cycles are examined using the universal multifractal approach and multifractal detrended fluctuation analysis. Then we convert these time series into networks using the horizontal visibility graph technique. Multifractal analysis of the resulting networks is performed using an algorithm proposed by us. The results from the multifractal analysis show that multifractality exists in both raw daily time series of X-ray brightness and their horizontal visibility graphs. It is also found that the empirical K(q) curves of raw time series can be fitted by the universal multifractal model. The numerical results on the raw data show that the Solar Cycle 23 is weaker than the Solar Cycle 22 in multifractality. The values of h(2) from multifractal detrended fluctuation analysis for these time series indicate that they are stationary and persistent, and the correlations in the time series of Solar Cycle 23 are stronger than those for Solar Cycle 22. Furthermore, the multifractal scaling for the networks of the time series can reflect some properties which cannot be picked up by using the same analysis on the original time series. This suggests a potentially useful method to explore geophysical data.
Journal Title
Nonlinear Processes in Geophysics
Volume
19
Issue/Number
6
Publication Date
1-1-2012
Document Type
Article
Language
English
First Page
657
Last Page
665
WOS Identifier
ISSN
1023-5809
Recommended Citation
Yu, Z. G.; Anh, V.; Eastes, R.; and Wang, D. L., "Multifractal analysis of solar flare indices and their horizontal visibility graphs" (2012). Faculty Bibliography 2010s. 3541.
https://stars.library.ucf.edu/facultybib2010/3541
Comments
Authors: contact us about adding a copy of your work at STARS@ucf.edu