Solar alert

Issued on 2022 Apr 12 0930 UTC

The GOES C1.6 flare (peaking at 05:21 UT on April 11) originated from the Catania sunspot group 71 (NOAA AR 2987) which was at the moment of flaring situated at the center of the solar disc. The associated full halo CME was first observed in the SOHO/LASCO C2 filed of view at about 05:48 UT. The CME had projected plane-of-the-sky speed of about 500 km/s. Due to the position of its source region (center of the solar disc) this halo CME is Earth directed and its arrival can be expected in the late afternoon of April 14.

Issued on 2022 Apr 12 1020 UTC

The partial halo CME with projected plane-of-the-sky speed of about 500 km/s and angular width of about 180 degrees, was observed in the evening of April 11. The CME was first time observed in the SOHO/LASCO C2 filed of view at 21:12 UT and in the STEREO A/COR2 field of view at 20:23 UT. There are no clear on disc signatures of the CME observed on the visible side of the Sun, as seen from Earth or from the STEREO A, indicating that this CME was a back side event and will therefore not arrive to Earth.

Reference for this alert

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