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Intermittency and Multifractional Brownian Character of Geomagnetic Time Series : Volume 20, Issue 4 (11/07/2013)

By Consolini, G.

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Book Id: WPLBN0003989623
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Intermittency and Multifractional Brownian Character of Geomagnetic Time Series : Volume 20, Issue 4 (11/07/2013)  
Author: Consolini, G.
Volume: Vol. 20, Issue 4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Consolini, G., Michelis, P. D., & Marco, R. D. (2013). Intermittency and Multifractional Brownian Character of Geomagnetic Time Series : Volume 20, Issue 4 (11/07/2013). Retrieved from

Description: INAF – Istituto di Astrofisica e Planetologia Spaziali, 00133 Rome, Italy. The Earth's magnetosphere exhibits a complex behavior in response to the solar wind conditions. This behavior, which is described in terms of mutifractional Brownian motions, could be the consequence of the occurrence of dynamical phase transitions. On the other hand, it has been shown that the dynamics of the geomagnetic signals is also characterized by intermittency at the smallest temporal scales. Here, we focus on the existence of a possible relationship in the geomagnetic time series between the multifractional Brownian motion character and the occurrence of intermittency. In detail, we investigate the multifractional nature of two long time series of the horizontal intensity of the Earth's magnetic field as measured at L'Aquila Geomagnetic Observatory during two years (2001 and 2008), which correspond to different conditions of solar activity. We propose a possible double origin of the intermittent character of the small-scale magnetic field fluctuations, which is related to both the multifractional nature of the geomagnetic field and the intermittent character of the disturbance level. Our results suggest a more complex nature of the geomagnetic response to solar wind changes than previously thought.

Intermittency and multifractional Brownian character of geomagnetic time series

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