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   https://doi.org/10.1002/2017JA024140  

   Hartinger, M. D. ; Xu, Z. ; Clauer, C. R. ; Yu, Y. ; Weimer, D. R. ; Kim, H. ; Pilipenko, V. ; Welling, D. T. ; Behlke, R. ; Willer, A. N. ( July 2017 , Journal of Geophysical Research: Space Physics)
2. Counter‐Electrojet Occurrence as Observed From C/NOFS Satellite and Ground‐Based Magnetometer Data Over the African and American Sectors

   https://doi.org/10.1029/2019SW002236  

   Habarulema, John Bosco ; Lefebvre, Gabrielle ; Moldwin, Mark B. ; Katamzi‐Joseph, Zama T ; Yizengaw, Endawoke ( July 2019 , Space Weather)

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3. Supporting Information for The Future of Ground Magnetometer Arrays in Support of Space Weather Monitoring and Research

   Engebretson, Mark ; Zesta, Eftyhia ( July 2017 , Space weather)

   This file contains three tables and one figure. Table S1 lists the institutions represented at the initial Ground Magnetometer Array Workshop. Table S2 contains information about all NSF-AGS supported and USGS ground-based magnetometer arrays as of Fall 2016 and Figure S1 is a map showing these arrays. Table S3 lists web sites serving ground magnetometer data. 

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4. A Large Simulation Set of Geomagnetic Storms—Can Simulations Predict Ground Magnetometer Station Observations of Magnetic Field Perturbations?

   https://doi.org/10.1029/2022SW003049  

   Al Shidi, Q. ; Pulkkinen, T. ; Toth, G. ; Brenner, A. ; Zou, S. ; Gjerloev, J. ( November 2022 , Space Weather)

   We use the Space Weather Modeling Framework Geospace configuration to simulate a total of 122 storms from the period 2010–2019. With the focus on the storm main phase, each storm period was run for 54 hr starting from 6 hr prior to the start of the Dst depression. The simulation output of ground magnetic variations, ΔB_Hin particular, were compared with ground magnetometer station data provided by SuperMAG to statistically assess the Geospace model regional magnetic perturbation prediction performance. Our results show that the regional predictions at mid‐latitudes are quite accurate, but the high‐latitude regional disturbances are still difficult to predict.

    

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5. The 2021 Antarctic Total Eclipse: Ground Magnetometer and GNSS Wave Observations From the 40 Degree Magnetic Meridian

   https://doi.org/10.1029/2022JA031142  

   Coyle, S. E. ; Hartinger, M. D. ; Clauer, C. R. ; Baker, J. B. H. ; Cnossen, I. ; Freeman, M. P. ; Weygand, J. M. ( February 2023 , Journal of Geophysical Research: Space Physics)

   On 04 December 2021, a total solar eclipse occurred over west Antarctica. Nearly an hour beforehand, a geomagnetic substorm onset was observed in the northern hemisphere. Eclipses are suggested to influence magnetosphere‐ionosphere (MI) coupling dynamics by altering the conductivity structure of the ionosphere by reducing photoionization. This sudden and dramatic change in conductivity is not only likely to alter global MI coupling, but it may also introduce a variety of localized instabilities that appear in both hemispheres. Global navigation satellite system (GNSS) based observations of the total electron content (TEC) in the southern high latitude ionosphere during the December 2021 eclipse show signs of wave activity coincident with the eclipse peak totality. Ground magnetic observations in the same region show similar activity, and our analysis suggest that these observations are due to an “eclipse effect” rather than the prior substorm. We present the first multi‐point interhemispheric study of a total south polar eclipse with local TEC observational context in support of this conclusion.

    

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