scholarly journals Magnetosonic Mach number dependence of the efficiency of reconnection between planetary and interplanetary magnetic fields

2009 ◽  
Vol 114 (A7) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. Grocott ◽  
S. V. Badman ◽  
S. W. H. Cowley ◽  
S. E. Milan ◽  
J. D. Nichols ◽  
...  
Keyword(s):  
Mach Number ◽  
Magnetic Fields ◽  
Interplanetary Magnetic Fields

Cosmic-ray fluctuations and interplanetary magnetic fields

1993 ◽  
Vol 199 (1) ◽  
pp. 125-132 ◽  
Author(s):  
K. Kudela ◽  
M. Slivka ◽  
M. Stehl�k ◽  
A. Geranios
Keyword(s):  
Magnetic Fields ◽  
Cosmic Ray ◽  
Interplanetary Magnetic Fields

Transport of charged particle pulses in interplanetary magnetic fields

1995 ◽  
Vol 45 (9) ◽  
pp. 767-775
Author(s):  
Y. I. Fedorov ◽  
B. A. Shakhov ◽  
M. Stehlík
Keyword(s):  
Charged Particle ◽  
Magnetic Fields ◽  
Interplanetary Magnetic Fields

scholarly journals Extremely intense (SML ≤–2500 nT) substorms: isolated events that are externally triggered?

2015 ◽  
Vol 33 (5) ◽  
pp. 519-524 ◽  
Author(s):  
B. T. Tsurutani ◽  
R. Hajra ◽  
E. Echer ◽  
J. W. Gjerloev
Keyword(s):  
Solar Wind ◽  
Magnetic Fields ◽  
Magnetic Storm ◽  
Solar Wind Plasma ◽  
Magnetic Storms ◽  
Input Energy ◽  
Stored Energy ◽  
Ionospheric Currents ◽  
Interplanetary Magnetic Fields ◽  
Very High

Abstract. We examine particularly intense substorms (SML ≤–2500 nT), hereafter called "supersubstorms" or SSS events, to identify their nature and their magnetic storm dependences. It is found that these intense substorms are typically isolated events and are only loosely related to magnetic storms. SSS events can occur during super (Dst ≤–250 nT) and intense (−100 nT ≥ Dst >–250) magnetic storms. SSS events can also occur during nonstorm (Dst ≥–50 nT) intervals. SSSs are important because the strongest ionospheric currents will flow during these events, potentially causing power outages on Earth. Several SSS examples are shown. SSS events appear to be externally triggered by small regions of very high density (~30 to 50 cm−3) solar wind plasma parcels (PPs) impinging upon the magnetosphere. Precursor southward interplanetary magnetic fields are detected prior to the PPs hitting the magnetosphere. Our hypothesis is that these southward fields input energy into the magnetosphere/magnetotail and the PPs trigger the release of the stored energy.

scholarly journals Anomalous magnetosheath flows and distorted subsolar magnetopause for radial interplanetary magnetic fields

2009 ◽  
Vol 36 (18) ◽  
Author(s):  
J.-H. Shue ◽  
J.-K. Chao ◽  
P. Song ◽  
J. P. McFadden ◽  
A. Suvorova ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Interplanetary Magnetic Fields

scholarly journals CO and the Multiphase ISM

1997 ◽  
Vol 170 ◽  
pp. 25-32
Author(s):  
Christopher F. Mckee
Keyword(s):  
Mach Number ◽  
Magnetic Fields ◽  
Interstellar Medium ◽  
Molecular Clouds ◽  
Molecular Gas ◽  
Wave Pressure ◽  
Multiphase Structure ◽  
Co Observations

CO observations indicate that molecular clouds have a complex multiphase structure, and this is compared with the multiphase structure of the diffuse interstellar medium. The trace ionization within the molecular gas is governed primarily by UV photoionization. Magnetic fields contribute a significantly larger fraction of the pressure in molecular clouds than in the diffuse interstellar medium. Observations suggest that the total Alfvén Mach number, mAtot, of the turbulence in the diffuse ISM exceeds unity; Zeeman observations are consistent with mAtot ≲ 1 in molecular clouds, but more data are needed to verify this. Most molecular clouds are self-gravitating, and they can be modeled as multi-pressure polytropes with thermal, magnetic, and wave pressure. The pressure and density within self-gravitating clouds is regulated by the pressure in the surrounding diffuse ISM.

scholarly journals Formation of a strong southward IMF near the solar maximum of cycle 23

2004 ◽  
Vol 22 (2) ◽  
pp. 673-687 ◽  
Author(s):  
S. Watari ◽  
M. Vandas ◽  
T. Watanabe
Keyword(s):  
Solar Wind ◽  
Magnetic Fields ◽  
Geomagnetic Storms ◽  
Solar Maximum ◽  
Interplanetary Shocks ◽  
Physical Processes ◽  
Interplanetary Magnetic Fields ◽  
Interplanetary Physics ◽  
Solar Wind Parameters ◽  
Interplanetary Disturbance

Abstract. We analyzed observations of the solar activities and the solar wind parameters associated with large geomagnetic storms near the maximum of solar cycle 23. This analysis showed that strong southward interplanetary magnetic fields (IMFs), formed through interaction between an interplanetary disturbance, and background solar wind or between interplanetary disturbances are an important factor in the occurrence of intense geomagnetic storms. Based on our analysis, we seek to improve our understanding of the physical processes in which large negative Bz's are created which will lead to improving predictions of space weather. Key words. Interplanetary physics (Flare and stream dynamics; Interplanetary magnetic fields; Interplanetary shocks)

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