Global model of whistler mode chorus in the near-equatorial region (|MLAT| < 18 degrees)

Meredith, Nigel P. ORCID: https://orcid.org/0000-0001-5032-3463; Horne, Richard B. ORCID: https://orcid.org/0000-0002-0412-6407; Shen, Xiao-Chen; Li, Wen; Bortnik, Jacob. 2020 Global model of whistler mode chorus in the near-equatorial region (|MLAT| < 18 degrees). Geophysical Research Letters, 47 (11), e2020GL087311. https://doi.org/10.1029/2020GL087311

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Abstract/Summary

We extend our database of whistler mode chorus, based on data from seven satellites, by including ~3 years of data from RBSP‐A and RBSP‐B and an additional ~6 years of data from THEMIS A, D, and E. The new database allows us to probe the near‐equatorial region in detail, revealing new features. In the equatorial source region, |MLAT| <6 degrees, strong wave power is most extensive in the 0.1‐0.4fce bands in the region 21‐11 MLT from the plasmapause out to L*=8 and beyond, especially near dawn. At higher frequencies, in the 0.4‐0.6fce frequency bands, strong wave power is more tightly confined, typically being restricted to the post‐midnight sector in the region 4< L* <6. The global distribution of strong chorus wave power changes dramatically with increasing magnetic latitude, with strong chorus waves in the region 12< |MLAT| <18 degrees predominantly observed at frequencies below 0.3fce in the pre‐noon sector, in the region 5< L* <8.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1029/2020GL087311
ISSN:	0094-8276
Additional Keywords:	whistler mode chorus, wave‐particle interations, radiation belts
Date made live:	28 May 2020 10:55 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/527415

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