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Fig. 13.

image

Flaring event 1 (>11:55 UT): Series of EIS spectrograms in the Fe XXIII 263.76 Å line taken during the onset phase of the X9.3 flare on 6 September 2017. The titles above spectrograms indicate the time and slit location, while the y-axis represents location along the slit, and Doppler velocities represented on the x-axis. Black horizontal lines indicate the location of the egression sources.

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