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Solar alert

Issued on 2024 Jul 29 0805 UTC

An X1.5 flare was recorded, with peak time 02:37 UTC on July 29. It is most likely associated with either NOAA AR 3764 (beta) or NOAA AR 3766 (beta), both currently located near the centre of the solar disk. No coronal mass ejection (CME) is currently associated with this flare.

Issued on 2024 Jul 29 1243 UTC

Two coronal mass ejections (CMEs) were observed in LASCO/C2 coronagraph imagery. The first was a halo CME, lifting off around 15:10 on July 28. Preliminary analysis suggests a velocity of around 600 km/s and a possible arrival time at Earth late on July 30, due to the expected interaction with an earlier halo CME which left the Sun around 02:36 UTC on July 28. The second was a faint partial halo CME observed around 02:40 UTC on July 29, most likely associated with the X1.5 flare peaking at 02:37 UTC on July 29. This CME might arrive at the Earth starting from July 31 mixed with the previously expected CME arrivals. Major storm conditions (NOAA Kp 7) can be expected, starting late on July 30. Further analysis for both events is ongoing.

Reference for this alert

All Presto solar alerts