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(a) Local pitch angle distribution from LOW-A in high-rate mode showing quasi-periodic electron flux bursts at 20–40 keV. (b) Bursty chorus wave emissions from the EMFISIS instrument (Kletzing et al. 2013) showing a nearly one-to-one correspondence with the flux bursts. The grey horizontal line indicates half the electron cyclotron frequency. From Fennell et al. (2014) ©The American Geophysical Union
