Recreating the Horizontal Magnetic Field at Colaba during the Carrington Event with Geospace Simulations

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dc.contributor.authorBlake, Seán P.
dc.contributor.authorPulkkinen, Antti
dc.contributor.authorSchuck, Peter W.
dc.contributor.authorGlocer, Alex
dc.contributor.authorOliveira, Denny
dc.contributor.authorWelling, Daniel
dc.contributor.authorWeigel, Robert S.
dc.contributor.authorQuaresima, Gary
dc.date.accessioned2021-03-26T17:29:31Z
dc.date.available2021-03-26T17:29:31Z
dc.date.issued2021-03-14
dc.description.abstractAn intriguing aspect of the famous 2 September 1859 geomagnetic disturbance (or ‘Carrington’ event) is the horizontal magnetic (B H ) dataset measured in Colaba, India (magnetic latitude approximately 20 degrees N). The field exhibits a sharp decrease of over 1600 nT and a quick recovery of about 1300 nT, all within a few hours during the daytime. The mechanism behind this has previously been attributed to magnetospheric processes, ionospheric processes or a combination of both. In this paper, we outline our efforts to replicate this low‐latitude magnetic field using the Space Weather Modelling Framework (SWMF). By simulating an extremely high pressure solar wind scenario, we can emulate the low‐latitude surface magnetic signal at Colaba. In our simulation, magnetospheric currents adjacent to the near‐Earth magnetopause and strong Region 1 field‐aligned currents (FACs) are the main contributors to the large Colaba B H . The rapid recovery of B H in our simulated scenario is due to the retreat of these magnetospheric currents as the magnetosphere expands, as opposed to ring current dynamics. In addition, we find that the scenario that best emulated the surface magnetic field observations during the Carrington event had a minimum calculated Dst value between ‐431 and ‐1191 nT, indicating that Dst may not be a suitable estimate of storm intensity for this kind of event.en_US
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020SW002585en_US
dc.format.extent60 pagesen_US
dc.genrejournal articles postprintsen_US
dc.identifierdoi:10.13016/m2ioei-cets
dc.identifier.citationBlake, Sá. P., Pulkkinen, A., Schuck, P. W., Glocer, A., Oliveira, D. M., Welling, D., et al. (2021). Recreating the Horizontal Magnetic Field at Colaba during the Carrington Event with Geospace Simulations. Space Weather, 19, e2020SW002585. https://doi.org/10.1029/2020SW002585en_US
dc.identifier.urihttps://doi.org/10.1029/2020SW002585
dc.identifier.urihttp://hdl.handle.net/11603/21228
dc.language.isoen_USen_US
dc.publisherAGU Pubicationen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Goddard Planetary Heliophysics Institute (GPHI)
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.rightsPublic Domain Mark 1.0*
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleRecreating the Horizontal Magnetic Field at Colaba during the Carrington Event with Geospace Simulationsen_US
dc.typeTexten_US

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