Solar alert

Issued on 2022 Sep 25 1342 UTC

Coronagraph images show a partial halo CME associated to the M1 flare from Catania group 48 (NOAA active region 3110) occurring close to the Eastern limb on September 23. The CME is visible in SoHO/LASCO C2 images from around 18:12UTC and has a projected speed of 1500km/s. It has an angular extent of around 160 degrees and the line of sight speed is estimated to be around 1600 km/s. Although directed well off the Sun-Earth line, given the speed of the CME a possible shock arrival cannot be excluded and model runs indicate it could occur late September 26 or in the early hours of September 27. Note also that the 13-21MeV proton flux as measured on board STEREO-A has risen, most probably in association to this event.

Reference for this alert

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