A small flux rope passed Solar Orbiter, at 0.48 AU, late on 21 March. It had a large Southward magnetic field. If this arrives at Earth (early 23 March if fast, but could be later) it could be geoeffective. Could be the event predicted by @NWSSWPC pic.twitter.com/eG4GaQbYVF

— Solar Orbiter magnetometer (@SolarOrbiterMAG) March 22, 2023