Shock Propagation Model version 2 and its application in predicting the arrivals at Earth of interplanetary shocks during Solar Cycle 23

Abstract. Sudden impulses (SI) in the tail lobe magnetic field associated with solar wind pressure enhancements are investigated using measurements from Cluster. The magnetic field components during the SIs change in a manner consistent with the assumption that an antisunward moving lateral pressure enhancement compresses the magnetotail axisymmetrically. We found that the maximum variance SI unit vectors were nearly aligned with the associated interplanetary shock normals. For two of the tail lobe SI events during which Cluster was located close to the tail boundary, Cluster observed the inward moving magnetopause. During both events, the spacecraft location changed from the lobe to the magnetospheric boundary layer. During the event on 6 November 2001 the magnetopause was compressed past Cluster. We applied the 2-D Cartesian model developed by collier98 in which a vacuum uniform tail lobe magnetic field is compressed by a step-like pressure increase. The model underestimates the compression of the magnetic field, but it fits the magnetic field maximum variance component well. For events for which we could determine the shock normal orientation, the differences between the observed and calculated shock propagation times from the location of WIND/Geotail to the location of Cluster were small. The propagation speeds of the SIs between the Cluster spacecraft were comparable to the solar wind speed. Our results suggest that the observed tail lobe SIs are due to lateral increases in solar wind dynamic pressure outside the magnetotail boundary.

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Study of the geoeffectiveness of coronal mass ejections, corotating interaction regions and their associated structures observed during Solar Cycle 23

Astrophysics and Space Science ◽

10.1007/s10509-016-2839-4 ◽

2016 ◽

Vol 361 (8) ◽

Cited By ~ 12

Author(s):

A. Badruddin ◽

Z. Falak

Keyword(s):

Solar Cycle ◽

Coronal Mass Ejections ◽

Corotating Interaction Regions ◽

Solar Cycle 23 ◽

Interaction Regions

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Forecast of the solar wind velocity and the interplanetary magnetic field radial component polarity at the phase of decay of solar cycle 23

Geomagnetism and Aeronomy ◽

10.1134/s001679320606003x ◽

2006 ◽

Vol 46 (6) ◽

pp. 701-707 ◽

Cited By ~ 6

Author(s):

I. S. Veselovsky ◽

I. G. Persiantsev ◽

Yu. S. Shugai

Keyword(s):

Magnetic Field ◽

Solar Wind ◽

Solar Cycle ◽

Interplanetary Magnetic Field ◽

Wind Velocity ◽

Solar Wind Velocity ◽

Radial Component ◽

Solar Cycle 23

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Analysis Techniques for Modeling the Pressure Wave Effects of Guillotine Ruptures of Steam Lines

ASME 2011 Pressure Vessels and Piping Conference: Volume 4 ◽

10.1115/pvp2011-57396 ◽

2011 ◽

Author(s):

Charles Becht ◽

Frederick J. Moody

Keyword(s):

Shock Wave ◽

Propagation Model ◽

Shock Propagation ◽

Cfd Model ◽

Analysis Techniques ◽

Wave Effects ◽

Fluid Properties ◽

Potential Damage ◽

Pipe Geometry ◽

Propagation Properties

The rupture of a pipe containing gas or steam at high pressure will cause a shock wave. In order to assess the potential damage that such a shock wave may cause to the surrounding structures, systems and components, it is necessary to determine the amplitude and propagation properties of the shock. A CFD model has been developed for the purpose of predicting shock propagation transients resulting from a sudden pipe rupture in terms of the fluid properties, pipe geometry, and surroundings. A simplified shock propagation model also is included, which offers verification of the CFD model results.

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Interpretable Machine Learning to Forecast SEP Events for Solar Cycle 23

10.1002/essoar.10507642.1 ◽

2021 ◽

Author(s):

Spiridon Kasapis ◽

Lulu Zhao ◽

Yang Chen ◽

Xiantong Wang ◽

Monica Bobra ◽

...

Keyword(s):

Machine Learning ◽

Solar Cycle ◽

Interpretable Machine Learning ◽

Solar Cycle 23

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