Solar alert

Issued on 2023 Sep 11 1244 UTC

North-West partial halo Coronal Mass Ejections (CME) was observed in the SOHO/LASCO coronograph images on September 10 at 17:12 UTC with an angular width of about 105 degrees and slow speed of about 225 km/s. The source of this CME is unclear. A possible candidate is a prominence near the NOAA Active Region 3424 located on the central meridian. In that case, a glancing blow may reach Earth not earlier than 4-5 days due to the very slow imitation speed of this CME.

Another Est partial halo CME was observed on September 11 at 01:25 UTC with an angular width of about 150 degrees and a speed of about 500 km/s. This CME is associated with the M1.4-class flare and the type II radio emission that occurred in the Catania NOAA Active Region 3429. A glancing blow may be visible in the solar wind condition near Earth in about 3.5 days.

No other clear Earth-directed CME were observed in the SOHO/LASCO coronograph images over the past 24 hours.

Reference for this alert

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