Spectroscopic observations of a solar limb flare recorded by SUMER on SOHO reveal , for the first time , hot fast magnetic reconnection outflows in the corona .
As the reconnection site rises across the SUMER spectrometer slit , significant blue- and red-shift signatures are observed in sequence in the Fe XIX line , reflecting upflows and downflows of hot plasma jets , respectively .
With the projection effect corrected , the measured outflow speed is between \sim 900 - 3500 km s ^ { -1 } , consistent with theoretical predictions of the Alfvénic outflows in magnetic reconnection region in solar impulsive events .
Based on theoretic models , the magnetic field strength near the reconnection region is estimated to be 19 - 37 Gauss .