Coronal mass ejection (CME)

Layer 1 — Physicsin the heliophysics subtree

Eruptive expulsion of ~10¹²–10¹³ kg of coronal plasma and embedded magnetic flux rope at 100s–3000 km/s. The principal driver of severe space-weather geomagnetic storms when the embedded field is southward (B_z < 0) at Earth.

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