Long-duration C1.5 solar flare produced Earth-directed CME | WHAT REALLY HAPPENED


Long-duration C1.5 solar flare produced Earth-directed CME

A long-duration C1.5 solar flare erupted from geoeffective Active Region 2699 on February 12, 2018. The event started at 00:15, peaked at 01:35 and ended at 03:21 UTC. A G1 - Minor geomagnetic storm watch is in effect for February 15.

This event produced an asymmetric halo Coronal Mass Ejection (CME), first observed in SOHO/LASCO C2 imagery at 01:25 UTC.

WSA/ENLIL model analysis of this event indicates a glancing blow late February 14 to early February 15. Current background solar wind speeds are slower than routine model predictions, so the forecast arrival timing of the CME has been slowed from the WSA-Enlil CME model run prediction.

A G1 - Minor geomagnetic storm watch is now in effect for February 15, 2018, in response associated with the arrival of this CME.

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