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

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.


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Authors: Meredith, Nigel P. ORCIDORCID record for Nigel P. Meredith, Horne, Richard B. ORCIDORCID record for Richard B. Horne, Shen, Xiao-Chen, Li, Wen, Bortnik, Jacob

On this site: Nigel Meredith, Richard Horne
16 June, 2020
Geophysical Research Letters / 47
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