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Conservation of open solar magnetic flux and the floor in the heliospheric magnetic field

St. Cyr, O. C.; Owens, M. J.; Crooker, N. U. +5 more

The near-Earth heliospheric magnetic field intensity, |B|, exhibits a strong solar cycle variation, but returns to the same ``floor'' value each solar minimum. The current minimum, however, has seen |B| drop below previous minima, bringing in to question the existence of a floor, or at the very least requiring a re-assessment of its value. In this…

CAWSES November 7-8, 2004, superstorm: Complex solar and interplanetary features in the post-solar maximum phase

Tsurutani, Bruce T.; Echer, Ezequiel; Guarnieri, Fernando L. +1 more

The complex interplanetary structures during 7 to 8 Nov 2004 are analyzed to identify their properties as well as resultant geomagnetic effects and the solar origins. Three fast forward shocks, three directional discontinuities and two reverse waves were detected and analyzed in detail. The three fast forward shocks ``pump'' up the interplanetary …

Magnetic complexity in eruptive solar active regions and associated eruption parameters

Georgoulis, Manolis K.

Using an efficient magnetic complexity index in the active-region solar photosphere, we quantify the preflare strength of the photospheric magnetic polarity inversion lines in 23 eruptive active regions with flare/CME/ICME events tracked all the way from the Sun to the Earth. We find that active regions with more intense polarity inversion lines h…