Date of Award
Spring 2005
Document Type
Thesis - Open Access
Degree Name
Master of Science in Space Science
Department
Physical Sciences
Committee Chair
James Wanliss
Committee Advisor
John Olivero
Committee Member
Mahmut Reyhanoglu
Committee Member
Hong Liu
Abstract
Ground-based magnetometer data were analyzed for the period of 1991-2001. The data were classified into periods of quiet and active magnetospheric activity. Those periods classified as quiet required that Kp < 1 for not less than 48 consecutive hours and active periods required a Kp > 4 for not less than 24 consecutive hours. Detrended fluctuation analysis was employed to analyze 40 events. A monofractal approach was used to identify differences in the Hurst exponent of quiet and active events. No statistical differences were found using this approach since both types of events displayed quasirandom walk behavior. A second approach determined the temporal variations in the Hurst exponent for each event. The Hurst exponent is temporally dynamic — active events are more correlated than quiet events - suggesting a multifractional rather than monofractal behavior. The results are useful to suggest an appropriate model of magnetic field fluctuations.
Scholarly Commons Citation
Cersosimo, Dario O., "A Measure of the Hurst Exponent Variability on Ground Based Magnetometer Data for Quiet and Active Magnetospheric Periods" (2005). Master's Theses - Daytona Beach. 27.
https://commons.erau.edu/db-theses/27
