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From 23:10 to 23:50 UT on 18 March 2004, the Double Star TC-1spacecraft detected eight flux ropes at the outbound crossing ofthe southern dawnside magnetopause. A notable guide field existedinside all ropes. In the mean time the Cluster spacecraft werestaying in the magnetosheath and found that the events occurredunder the condition of southward IMF Bz and dominant negativeIMF By. There are six ropes that appeared quasi-periodically,with a repeated period being approximately 1-4 min. The lastflux rope lasts for a longer time interval with a larger peak inthe BN variations; it can thus be referred to as a typical FTE.The 18 March 2004 event is quite similar to the multiple flux ropeevent observed by Cluster on 26 January 2001 at the northernduskside high-latitude magnetopause. A detailed comparison ofthese two events is made in the paper. Preliminary studies implythat both of these multiple flux ropes events seem to be producedby component reconnection at the dayside low-latitudemagnetopause

Multiple flux rope events at the magnetopause observations by TC-1 on 18 March 2004