HARP 3169

The giant active region HARP 3169 (NOAA 12192 has produced 6 X-class flares since Oct. 19, the latest of which 27 October 14:47 UT. These have caused a short-term severe interference to radio communications. In connection with these events no halo-CMEs have been reported. We therefore expect no geomagnetic storm affecting the electrical system.