“…The magnetic island is characterized by a bundle of circular magnetic field lines without a strong core field in the “cross‐tail” direction [ Borg et al ., ; Kiehas et al ., ; Huang et al ., ]; it is typically a signature/product of multipoint reconnection in the magnetotail [ Deng et al ., ; Eastwood et al ., ; Huang et al ., ; Fu et al ., ]. The magnetic island with strong core field may be related to guide‐field reconnection called the flux rope [ Teh et al ., ; Huang et al ., ], while the magnetic island without core field is usually called magnetic island [ Fu et al ., ] or plasmoid [ Zong et al ., ]. In 2‐D [e.g., Markidis et al ., ] and 3‐D [e.g., Daughton et al ., ] simulations, the magnetic‐island (flux‐rope) structures can be well recognized, as well as in spacecraft in situ measurements [ Slavin et al ., ].…”