EGU22-4043, updated on 27 Mar 2022
https://doi.org/10.5194/egusphere-egu22-4043
EGU General Assembly 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Seasonal Characteristic of Auroral Kilometric Radiation in the Radiation Belts

Ping Li, Fuliang Xiao, Si Liu, and Sai Zhang
Ping Li et al.
  • Changsha University of Science & Technology, School of Physics & Electronic Science, China (572755613@qq.com)

Auroral kilometric radiation (AKR) is one of the strong radio emission phenomenons with kilometer wavelengths, and similar emissions have been detected on other magnetized planets of the solar system. AKR is generated by suprathermal electrons (1-10 keV) injected from the plasma sheet and has been observed at the lower latitude region of the radiation belts from the Van Allen Probes. Here, we analyze the seasonal characteristic of AKR in the region of L = 3-7 and λ = 0− 20using observations from 1 December 2012 to 31 November 2018. Statistical results (4,559 events in total) show that AKR emissions occur most frequently in autumn both in the northern and southern hemispheres. The correlation coefficient between the number of AKR events in each season and the Kp (the geomagnetic activity index) index of these events can reach 0.82. These results suggest that AKR emissions in the lower latitude regions depend on the geomagnetic activity.

How to cite: Li, P., Xiao, F., Liu, S., and Zhang, S.: Seasonal Characteristic of Auroral Kilometric Radiation in the Radiation Belts, EGU General Assembly 2022, Vienna, Austria, 23–27 May 2022, EGU22-4043, https://doi.org/10.5194/egusphere-egu22-4043, 2022.