Multispacecraft Observations and Modeling of the June 22/23, 2015 Geomagnetic Storm

TitleMultispacecraft Observations and Modeling of the June 22/23, 2015 Geomagnetic Storm
Publication TypeJournal Article
Year of Publication2016
AuthorsReiff, PH, Daou, AG, Sazykin, SY, Nakamura, R, Hairston, MR, Coffey, V, Chandler, MO, Anderson, B, Russell, CT, Welling, D, Fuselier, SA, Genestreti, KJ
JournalGeophysical Research Letters
Date Published05/2016
KeywordsDipolarization; Geomagnetic storm; MMS; prediction; simulation; Space weather; Van Allen Probes
AbstractThe magnetic storm of June 22-23, 2015 was one of the largest in the current solar cycle. We present in situ observations from the Magnetospheric Multiscale Mission (MMS) and the Van Allen Probes (VAP) in the magnetotail, field-aligned currents from AMPERE, and ionospheric flow data from DMSP. Our real-time space weather alert system sent out a “red alert”, correctly predicting Kp indices greater than 8. We show strong outflow of ionospheric Oxygen, dipolarizations in the MMS magnetometer data, and dropouts in the particle fluxes seen by the MMS FPI instrument suite. At ionospheric altitudes, the AMPERE data show highly variable currents exceeding 20 MA. We present numerical simulations with the BATS-R-US global magnetohydrodynamic (MHD) model linked with the Rice Convection Model (RCM). The model predicted the magnitude of the dipolarizations, and varying polar cap convection patterns, which were confirmed by DMSP measurements.
Short TitleGeophys. Res. Lett.

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