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The development of lower-atmosphere turbulence early in a solar flare

Fletcher, L.; Labrosse, N.; Jeffrey, N. L. S. +1 more

We present the first observational study of the onset and evolution of solar flare turbulence in the lower solar atmosphere on an unprecedented time scale of 1.7 s using the Interface Region Imaging Spectrograph observing plasma at a temperature of 80,000 K. At this time resolution, nonthermal spectral line broadening, indicating turbulent velocit…