scholarly journals A statistical study of the spatial structure of interplanetary magnetic field substorm triggers and their associated magnetic response

2009 ◽  
Vol 114 (A2) ◽  
pp. n/a-n/a ◽  
Author(s):  
Tung-Shin Hsu ◽  
Robert L. McPherron
Keyword(s):  
Magnetic Field ◽  
Spatial Structure ◽  
Interplanetary Magnetic Field ◽  
Statistical Study ◽  
Magnetic Response

A large statistical study of the entry of interplanetary magnetic field Y-component into the magnetosphere

1995 ◽  
Vol 22 (16) ◽  
pp. 2083-2086 ◽  
Author(s):  
S. Wing ◽  
P. T. Newell ◽  
D. G. Sibeck ◽  
K. B. Baker
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Statistical Study

scholarly journals Cluster survey of the mid-altitude cusp: 1. size, location, and dynamics

2006 ◽  
Vol 24 (11) ◽  
pp. 3011-3026 ◽  
Author(s):  
F. Pitout ◽  
C. P. Escoubet ◽  
B. Klecker ◽  
H. Rème
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Time Delay ◽  
Interplanetary Magnetic Field ◽  
Statistical Study ◽  
Proper Time ◽  
Dynamic Pressure ◽  
Solar Wind Dynamic Pressure ◽  
Summer Hemisphere ◽  
External Conditions

Abstract. We present a statistical study of four years of Cluster crossings of the mid-altitude cusp. In this first part of the study, we start by introducing the method we have used a) to define the cusp properties, b) to sort the interplanetary magnetic field (IMF) conditions or behaviors into classes, c) to determine the proper time delay between the solar wind monitors and Cluster. Out of the 920 passes that we have analyzed, only 261 fulfill our criteria and are considered as cusp crossings. We look at the size, location and dynamics of the mid-altitude cusp under various IMF orientations and solar wind conditions. For southward IMF, Bz rules the latitudinal dynamics, whereas By governs the zonal dynamics, confirming previous works. We show that when |By| is larger than |Bz|, the cusp widens and its location decorrelates from By. We interpret this feature in terms of component reconnection occurring under By-dominated IMF. For northward IMF, we demonstrate that the location of the cusp depends primarily upon the solar wind dynamic pressure and upon the Y-component of the IMF. Also, the multipoint capability of Cluster allows us to conclude that the cusp needs typically more than ~20 min to fully adjust its location and size in response to changes in external conditions, and its speed is correlated to variations in the amplitude of IMF-Bz. Indeed, the velocity in °ILAT/min of the cusp appears to be proportional to the variation in Bz in nT: Vcusp=0.024 ΔBz. Finally, we observe differences in the behavior of the cusp in the two hemispheres. Those differences suggest that the cusp moves and widens more freely in the summer hemisphere.

scholarly journals Properties of Kelvin-Helmholtz waves at the magnetopause under northward interplanetary magnetic field: Statistical study

2014 ◽  
Vol 119 (9) ◽  
pp. 7485-7494 ◽  
Author(s):  
Dong Lin ◽  
Chi Wang ◽  
Wenya Li ◽  
Binbin Tang ◽  
Xiaocheng Guo ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Interplanetary Magnetic Field ◽  
Statistical Study
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