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Previous studies have revealed that solar coronal jets triggered by theeruption of mini-filaments (MFs) conform to the famous magnetic-breakoutmechanism. In such scenario, a breakout current sheet (BCS) and a flare currentsheet (FCS) should be observed during the jets. With high spatial and temporalresolution data from the SDO, the NVST, the RHESSI, the Wind, and the GOES, wepresent observational evidence of a BCS and a FCS formation during coronal jetsdriven by a MF eruption occurring in the active region NOAA 11726 on 2013 April21. Magnetic field extrapolation show that the MF was enclosed by a fan-spinemagnetic structure. The MF was activated by flux cancellation under it, andthen slowly rose. A BCS formed when the magnetic fields wrapping the MFsqueezed to antidirectional external open fields. Simultaneously, one thinbright jet and two bidirectional jet-like structures were observed. As the MFerupted as a blowout jet, a FCS was formed when the two distended legs insidethe MF field came together. One end of the FCS connected the post-flare loops.The peak temperature of BCS was calculated to be 2.5 MK. The length, width andpeak temperature of FCS was calculated to be 4.35-4.93 Mm, 1.31-1.45 Mm, and2.5 MK, respectively. The magnetic reconnection rate associated with the FCSwas estimated to be from 0.266 to 0.333. This event also related to a type IIIradio burst, indicating its influence on interplanetary space. Theseobservations support the scenario of the breakout model as the triggermechanism of coronal jets, and flux cancellation was the driver of this event.

Simultaneous observations of a breakout current sheet and a flare current sheet in a coronal jet event