A X1.9 flare (SIDC 4707) was observed in the GOES 19 X ray flux data with start time 23:37 UTC, peak time 23:50 UTC and end time 23:54 UTC on June 19. The flare is associated with SIDC Sunspot Group 523 (NOAA Active Region 4114), which is now classified as magnetic type beta-gamma. No proton event has been associated to the flaring activity and no coronal mass ejection (CME) is observed in the available coronagraph data. M-class flaring related to this region is likely with small chances for more X-class flaring.

A class X1.9 solar X-ray flare occurred on 2025/06/19 with peak time 23:50UT

A halo or partial-halo CME was detected with the following characteristics: t0 | dt0| pa | da | v | dv | minv| maxv| 2025-06-18T05:00:07.635 | 2.0 | 282 | 154 | 423 | 210 | 134 | 892 t0: onset time, earliest indication of liftoff dt0: duration of liftoff (hours) pa: principal angle, counterclockwise from North (degrees) da: angular width of the CME (degrees), v: median velocity (km/s) dv: variation (1 sigma) of velocity over the width of the CME mindv: lowest velocity detected within the CME maxdv: highest velocity detected within the CME

Solar flaring activity was at high levels over the past 24 hours. A total of 7 numbered sunspot groups were identified on the visible solar disk. The strongest activity was a X1.9 flare (SIDC 4707) produced by SIDC Sunspot Group 523 (NOAA Active Region 4114) with peak time 09:17 UTC on June 19. This region was responsible for most of the flaring activity, including an M4.6 flare (SIDC Flare 4711) peak time 00:04 UTC on June 20. The region has meanwhile decreased its underlying magnetic field complexity and is currently classified as magnetic type beta-gamma. Other notable regions are SIDC Sunspot Group 526 (NOAA Active Region 4117), classified as beta-gamma and SIDC Sunspot Group 527 (NOAA Active Region 4118), classified as magnetic type beta. The solar flaring activity is expected to be at moderate levels over the next 24 hours with expected C-class flares and 55% chances of M-class flaring. No Earth-directed coronal mass ejections (CMEs) have been identified in the available coronagraph imagery over the past 24 hours. A large positive polarity coronal hole (SIDC Coronal Hole 104) continues to reside on the central meridian. This is a mid-latitude southern coronal hole covering a large longitudinal range which first crossed the central meridian on June 11. High speed stream emanating from it is expected to continue influencing the Earth over the next days. Over the past 24 hours the greater than 10 MeV GOES proton flux has been at nominal levels and is expected to remain at nominal levels over the next days. The geomagnetic conditions over the past 24 hours were quiet to active. Quiet to active geomagnetic conditions are expected for the next 24 hours.

The greater than 10 MeV GOES 18 electron flux briefly exceeded the 1000 pfu threshold over the last 24 hours and is expected to exceed the threshold again over the next 24 hours. The 24-hour electron fluence was at the nominal levels and is expected to remain so in the next 24 hours. Over the past 24 hours the solar wind parameters (ACE and DSCOVR) remained under the continuous influence of a high speed stream from a large positive-polarity coronal hole, which continues to partly reside on the central meridian. The interplanetary magnetic field (B) was mildly enhanced with a maximum value of 9.7 nT and a minimum Bz of -7.7 nT. The solar wind speed was slowly varying, currently around 600 km/s. The B field phi angle was predominantly in the positive sector (directed away from the Sun). The solar wind conditions are expected to continue to be under the influence of a high speed stream over the next days.