Solar alert

Issued on 2023 Nov 28 1931 UTC

A partial halo Coronal Mass Ejection (CME) can be seen in LASCO-C2/SOHO starting from yesterday 19:48 UTC and has an estimated speed of 900 km/s. Another partial halo CME was also observed by LASCO-C2/SOHO at 23:15 UTC yesterday with an estimated speed of 1600 km/s. Both CME are judged to have Earth-directed components. As the later is much faster than the former, they are expected to merge into each other. They are also expected to merge with the CME launched yesterday at 06:48 UTC and reported in the previous PRESTO alert. The disturbance is likely to arrive at Earth's environment in the second half of 30 Nov.

Reference for this alert

All Presto solar alerts