Abstract:Chorus waves play a key role in outer Van Allen electron belt dynamics through cyclotron resonance. Here, we use Van Allen Probes data to reveal a new and distinct population of intense chorus waves excited in the heart of the radiation belt during the main phase of geomagnetic storms. The power of the waves is typically ∼2-3 orders of magnitude greater than pre-storm levels, and are generated when fluxes of ∼10-100 keV electrons approach or exceed the Kennel-Petschek limit. These intense chorus waves rapidly … Show more
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