Articles | Volume 39, issue 2
Ann. Geophys., 39, 277–288, 2021
https://doi.org/10.5194/angeo-39-277-2021

Special issue: Special Issue on the joint 19th International EISCAT Symposium...

Ann. Geophys., 39, 277–288, 2021
https://doi.org/10.5194/angeo-39-277-2021

Regular paper 04 Mar 2021

Regular paper | 04 Mar 2021

Characteristics of fragmented aurora-like emissions (FAEs) observed on Svalbard

Joshua Dreyer et al.

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Cited articles

Alcayde, D., Fontanari, J., Bauer, P., and de La Beaujardiere, O.: Some properties of the auroral thermosphere inferred from initial EISCAT observations, Radio Sci., 18, 881–886, https://doi.org/10.1029/RS018i006p00881, 1983. a
Ashrafi, M.: ASK: Auroral Structure and Kinetics in action, Astron. Geophys., 48, 35–37, https://doi.org/10.1111/j.1468-4004.2007.48435.x, 2007. a
Ashrafi, M., Lanchester, B. S., Lummerzheim, D., Ivchenko, N., and Jokiaho, O.: Modelling of N21P emission rates in aurora using various cross sections for excitation, Ann. Geophys., 27, 2545–2553, https://doi.org/10.5194/angeo-27-2545-2009, 2009. a
Buchert, S. C., Tsuda, T., Fujii, R., and Nozawa, S.: The Pedersen current carried by electrons: a non-linear response of the ionosphere to magnetospheric forcing, Ann. Geophys., 26, 2837–2844, https://doi.org/10.5194/angeo-26-2837-2008, 2008. a, b
Chen, X.-C., Lorentzen, D. A., Moen, J. I., Oksavik, K., and Baddeley, L. J.: Simultaneous ground-based optical and HF radar observations of the ionospheric footprint of the open/closed field line boundary along the geomagnetic meridian, J. Geophys. Res.-Space, 120, 9859–9874, https://doi.org/10.1002/2015JA021481, 2015. a
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Short summary
Small-scale auroral features are still being discovered and are not well understood. Where aurorae are caused by particle precipitation, the newly reported fragmented aurora-like emissions (FAEs) seem to be locally generated in the ionosphere (hence, aurora-like). We analyse data from multiple instruments located near Longyearbyen to derive their main characteristics. They seem to occur as two types in a narrow altitude region (individually or in regularly spaced groups).