The Propagation and Coherency of Whistler Mode Chorus Waves to Higher Magnetic Latitudes

Wave-particle interactions between whistler mode chorus waves and electrons can cause outer radiation belt electrons to scatter or accelerate to relativistic energies. These interactions may generate many interesting physical phenomena such as electron precipitation, electron microbursts, and diffuse and pulsating auroras. Most of these phenomena require the chorus waves, which originate at the magnetic equator, to propagate to higher magnetic latitudes. In the current study, we look for direct observational evidence of chorus waves originating in the source region and propagating to magnetic latitudes greater than 15 degrees. We compare electric and magnetic field data from either ARASE, MMS, or Van Allen Probes with one being in the source region while the other is located at a higher magnetic latitude. Coherency analysis between the waves was done to verify the propagation. In addition to the coherency, other wave parameters such as ellipticity and wave normal and azimuthal angles were compared to study the propagation properties. We investigate any wave-particle interaction signatures that may result from the waves present.