Solar alert

Issued on 2021 Mar 21 1148 UTC

A partial-halo Coronal Mass Ejection (CME), with an angular width of about 150 degrees, was observed in SOHO/LASCO coronagraph imagery on Mar 20, 2021, from around 01:45 UTC. The CME is due to a filament eruption in the south east quadrant that occurred late on Mar 19. The projected speed was estimated around 300 km/s, with an estimated true speed of up to 500 km/s. Since the filament was located close to the central meridian of the solar disc, the CME may have a glancing blow at Earth on Mar 23 / early on Mar 24.

Reference for this alert

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