EGU21-9117
https://doi.org/10.5194/egusphere-egu21-9117
EGU General Assembly 2021
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Substorm evolution of the auroral zone boundaries on the dawn and dusk flanks: DMSP and POES/MetOp observations

Margot Decotte, Karl M. Laundal, Spencer Hatch, and Jone Reistad
Margot Decotte et al.
  • Birkeland Centre for Space Science, Department of Physics and Technology, University of Bergen, Norway

We present a method for tracking the evolution of the auroral boundaries on the dawn and dusk flanks during magnetospheric substorms by using a combined database of auroral zone boundaries derived from DMSP and POES/MetOp satellite particle measurements. Auroral boundaries can be identified by the Kilcommons et al. (2017) algorithm which use electron energy fluxes from the DMSP spectrometer (SSJ instrument). We show how auroral boundaries may also be obtained from precipitating electron observations from the POES/MetOp Total Energy Detector (TED) instrument by subjecting the TED electron measurements to an algorithm similar to that presented by Kilcommons et al. (2017). Boundaries derived from the two satellite missions are similar, suggesting that the technique for auroral oval boundary identification is physically meaningful.

How to cite: Decotte, M., Laundal, K. M., Hatch, S., and Reistad, J.: Substorm evolution of the auroral zone boundaries on the dawn and dusk flanks: DMSP and POES/MetOp observations, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-9117, https://doi.org/10.5194/egusphere-egu21-9117, 2021.

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