World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Does the Magnetosphere Behave Differently on Weekends? : Volume 20, Issue 8 (30/11/-0001)

By Karinen, A.

Click here to view

Book Id: WPLBN0004000940
Format Type: PDF Article :
File Size: Pages 6
Reproduction Date: 2015

Title: Does the Magnetosphere Behave Differently on Weekends? : Volume 20, Issue 8 (30/11/-0001)  
Author: Karinen, A.
Volume: Vol. 20, Issue 8
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


APA MLA Chicago

Ulich, T., Manninen, J., Mursula, K., & Karinen, A. (-0001). Does the Magnetosphere Behave Differently on Weekends? : Volume 20, Issue 8 (30/11/-0001). Retrieved from

Description: Department of Physical Sciences, P.O. Box 3000, University of Oulu, FIN-90014 Oulu, Finland. Global geomagnetic activity has been suggested to be enhanced during weekends above the weekly average after 1930. Before the 1930s, weekends and weekdays were found to be equally active. This so-called "weekend effect" was suggested to be due to power line harmonic radiation (PLHR) in the VLF range emitted by electric power lines. Since the consumption of electric power is different on weekends and weekdays, leading to different PLHR intensities, this could possibly cause the "weekend effect" in global geomagnetic activity. In the present paper, we reanalyse the suggested "week-end effect" in global geomagnetic activity using the 69-year planetary geomagnetic Ap index and the 131-year antipodal aa index. We conclude that there is no statistically significant "weekend effect" during the interval covered by these geo-magnetic activity indices. Although global geomagnetic activity is slightly enhanced on weekends from the 1930s to the 1980s, the more recent data show rather a relative decrease in global geomagnetic activity on weekends, contrary to the expected increase in the "weekend effect", due to increasing power consumption. Moreover, the weekly distribution is fairly similar in solar wind speed and global geomagnetic activity during the last 35 years, further supporting the view that the "weekend effect" is only a statistical fluctuation.

Key words. Geomagnetism and paleomagnetism (time variations, diurnal to secular) – Magnetospheric physics (planetary magnetospheres; storms and substorms)

Does the magnetosphere behave differently on weekends?


Click To View

Additional Books

  • Winds and Tides in the Mid-latitude Sout... (by )
  • Observations of the Generation of Eastwa... (by )
  • Themis and Ground-based Observations of ... (by )
  • Excitation of the Ionospheric Resonance ... (by )
  • Stratosphere-troposphere Exchange in an ... (by )
  • Estimation of the Characteristic Energy ... (by )
  • Relationship Between Propagation Directi... (by )
  • Suprathermal Electron Acceleration Durin... (by )
  • Selection Effects in Identifying Magneti... (by )
  • Plasma Transport in the Magnetotail Lobe... (by )
  • Letter to the Editor: Revision of the Ba... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.