Articles | Volume 44, issue 2
https://doi.org/10.5194/angeo-44-1109-2026
https://doi.org/10.5194/angeo-44-1109-2026
Regular paper
 | 
19 Oct 2026
Regular paper |  | 19 Oct 2026

Incoherent Scatter Radar Observations of the F Region of the Ionosphere above the Eastern US during the April 2024 Solar Eclipse

Sevag Derghazarian, Larisa P. Goncharenko, Mateo C. Serrano, Shun-Rong Zhang, Philip J. Erickson, Anthea J. Coster, Dupinder Singh, and William Rideout

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Cited articles

Aa, E., Erickson, P. J., Zhang, S.-R., Zou, S., Coster, A. J., Goncharenko, L. P., and Foster, J. C.: A Statistical Study of the Subauroral Polarization Stream Over North American Sector Using the Millstone Hill Incoherent Scatter Radar 1979–2019 Measurements, J. Geophys. Res.-Space, 125, e2020JA028584, https://doi.org/10.1029/2020JA028584, 2020. a
Aa, E., Huba, J., Zhang, S.-R., Coster, A. J., Erickson, P. J., Goncharenko, L. P., Vierinen, J., and Rideout, W.: Multi-instrument and SAMI3-TIDAS data assimilation analysis of three-dimensional ionospheric electron density variations during the April 2024 total solar eclipse, J. Geophys. Res.-Space, 129, e2024JA032955, https://doi.org/10.1029/2024JA032955, 2024. a, b, c, d, e, f
Bravo, M., Martínez-Ledesma, M., Foppiano, A., Urra, B., Ovalle, E., Villalobos, C., Souza, J., Carrasco, E., Muñoz, P. R., Tamblay, L., Vega-Jorquera, P., Marín, J., Pacheco, R., Rojo, E., Leiva, R., and Stepanova, M.: First report of an eclipse from Chilean ionosonde observations: Comparison with total electron content estimations and the modeled maximum electron concentration and its height, J. Geophys. Res.-Space, 125, e2020JA027923, https://doi.org/10.1029/2020JA027923, 2020. a
Bravo, M., Molina, M. G., Martínez-Ledesma, M., de Haro Barbás, B., Urra, B., Elías, A., Souza, J., Villalobos, C., Namour, J. H., Ovalle, E., Venchiarutti, J. V., Blunier, S., Valdés-Abreu, J. C., Guillermo, E., Rojo, E., de Pasquale, L., Carrasco, E., Leiva, R., Castillo Rivera, C., Foppiano, A., Milla, M., Muñoz, P. R., Stepanova, M., Valdivia, J. A., and Cabrera, M.: Ionospheric response modeling under eclipse conditions: Evaluation of 14 December 2020, total solar eclipse prediction over the South American sector, Front. Astron. Space Sci., 9, 1021910, https://doi.org/10.3389/fspas.2022.1021910, 2022. a, b
Burmaka, V. and Chernogor, L.: Solar eclipse of August 1, 2008, above Kharkov: 2. Observation results of wave disturbances in the ionosphere, Geomagn. Aeronomy, 53, 479–491, 2013. a
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Short summary
We present large scale changes to the ionosphere that were observed over a large portion of the continental US from 200 – 450 km altitude during the April 2024 solar eclipse. We observed a decrease in electron density of 50 %, and in electron and ion temperatures of 40 % and 20 % respectively. Unique features included lower densities and temperatures north of the eclipse path as compared to the south, and drops in ion temperature of of 225 K which is among the largest reported during an eclipse.
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