Trenchi, L.L.TrenchiMARCUCCI, Maria FedericaMaria FedericaMARCUCCIFear, R. C.R. C.Fear2021-02-232021-02-2320150094-8276http://hdl.handle.net/20.500.12386/30551Magnetic reconnection at the magnetopause occurs with a large density asymmetry and for a large range of magnetic shears. In these conditions, a motion of the X line has been predicted in the direction of the electron diamagnetic drift. When this motion is super Alfvenic, reconnection should be suppressed. We analysed a large data set of Double Star TC-1 dayside magnetopause crossings, which includes reconnection and nonreconnection events. Moreover, it also includes several events during which TC-1 is near the X line. With these close events, we verified the diamagnetic suppression condition with local observations near the X line. Moreover, with the same close events, we also studied the motion of the X line along the magnetopause. It is found that, when reconnection is not suppressed, the X line moves northward or southward according to the orientation of the guide field, which is related to the interplanetary magnetic field B<SUB>Y</SUB> component, in agreement with the diamagnetic drift.STAMPAenArticle10.1002/2015GL0652132-s2.0-84940450712000360414900001https://agupubs.onlinelibrary.wiley.com/doi/full/10.1002/2015GL0652132015GeoRL..42.6129TFIS/05 - ASTRONOMIA E ASTROFISICA