EGU2020-22086
https://doi.org/10.5194/egusphere-egu2020-22086
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Recreating the Carrington Event Magnetic Field Measurements using Extremely High Pressure Solar Wind Scenarios and the Space Weather Modelling Framework

Seán Blake1,2, Antti Pulkkinen2, Pete Schuck2, and Alex Glocer2
Seán Blake et al.
  • 1Department of Physics, Catholic University of America, DC, USA
  • 2NASA Goddard Space Flight Center, Heliophysics Science Division, Greenbelt, Maryland, USA

An intriguing aspect of the 2 September 1859 geomagnetic disturbance (or Carrington event) is the horizontal magnetic dataset measured in Colaba, India (magnetic latitude approximately 20 degrees N). This dataset exhibits a sharp decrease of over 1600 nT and a quick recovery of about 1300 nT, all within a few hours during the solar daytime. The mechanism behind this has previously been attributed to magnetospheric processes, ionospheric processes or a combination of both. In this talk, we outline our efforts to recreate this low-latitude magnetic dataset using the Space Weather Modelling Framework (SWMF). By simulating an array of extremely high pressure solar wind scenarios, we can recreate the low-latitude surface magnetic signal at Colaba. We find that the position of the magnetopause is an important factor for such quick deviations and recoveries in dayside surface magnetic measurements. In addition, we find that scenarios which accurately recreated surface magnetic field observations during the Carrington event had minimum Dst values of only -610 nT.

How to cite: Blake, S., Pulkkinen, A., Schuck, P., and Glocer, A.: Recreating the Carrington Event Magnetic Field Measurements using Extremely High Pressure Solar Wind Scenarios and the Space Weather Modelling Framework, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-22086, https://doi.org/10.5194/egusphere-egu2020-22086, 2020

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