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March 19, 2026Journal of Geophysical Research Space PhysicsOpen Access

Frequency Extensions of Auroral Kilometric Radiation: The Key to Unlocking Earth's Radio Response to Substorms

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Authors

SWSimon James WalkerCJCaitríona M. JackmanAFA. R. Fogg

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Overview

Analysis of auroral kilometric radiation reveals distinct frequency responses to substorms, suggesting better identification techniques.

Key Points

  • This research investigates how the frequency structure of auroral kilometric radiation (AKR) varies with substorm activities.
  • Analyzed extended data set of AKR bursts from WIND spacecraft.
  • Introduced a new adaptive method to identify low and high frequency extensions of AKR.
  • Examined occurrence rates and integrated power of LFEs and HFEs concerning substorm epochs.
  • Utilized substorm onset lists from auroral imagery and magnetometers for analysis.
  • LFEs show a significant increase in power and occurrence shortly after substorm onset.
  • HFEs exhibit less systematic responses compared to LFEs, indicating they are extensions of the main AKR.
  • Substorm onset times from auroral imagery produce a stronger AKR response than those from ground magnetometers.

Cite This Study

Walker et al. (2026) studied this question.

synapsesocial.com/papers/69bb92f2496e729e629809e3https://doi.org/10.1029/2025ja034719
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