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Solar alert

Issued on 2021 Sep 28 1358 UTC

A halo CME erupted today, first seen at 07:00 UT on SOHO/LASCO/C2 (and 06:52 UT on STEREO/COR2). Its speed is calculated to be 934 km/s, with an expected arrival time to the Earth around 18:00 UT on 30 September.

Reference for this alert

All Presto solar alerts