Solar flare & geomagnetic storm
SPACE WEATHER
flare class
CME speed
IMF Bz
Earth's field
field lines
aurora oval
shock front
Launch CME
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A southward IMF Bz reconnects efficiently with Earth's field, driving the ring current and dropping Dst — a real geomagnetic storm. Northward Bz mostly deflects the CME.
SPACE WEATHER · CME – MAGNETOSPHERE COUPLING MODEL