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Creators/Authors contains: "Weimer, D R"

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  1. ; ; ; ; (, Earth and Space Science)
    Key Points Magnetic field measurements are obtained from magnetic conjugate points in both hemispheres Under optimal conditions the conjugate magnetic fields are very similar, with signs reversed on two components due to coordinate geometries More often the fields differ due to different seasonal conductivities and asymmetrical driving by the magnetic field in the solar wind 
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  2. ; ; ; ; ; ; ; (, Geophysical Research Letters)
    Abstract Solar eclipses present a rare glimpse into the impact of ionospheric electrodynamics on the magnetosphere independent of other well studied seasonal influences. Despite decades of study, we still do not have a complete description of the conditions for geomagnetic substorm onset. We present herein a mutual information based study of previously published substorm onsets and the past two decades of eclipses which indicates the likelihood of co‐occurrence is greater than random chance. A plausible interpretation for this relation suggests that the abrupt fluctuations in ionospheric conductivity during an eclipse may influence the magnetospheric preconditions of substorm initiation. While the mechanism remains unclear, this study presents strong evidence of a link between substorm onset and solar eclipses. 
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  3. (, Journal of Geophysical Research: Space Physics)
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  4. ; ; (, Journal of Geophysical Research: Space Physics)
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