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Solar alert

Issued on 2023 Sep 22 0758 UTC

A partial halo CME with angular width around 150 degrees was first seen by LASCO-C2 at 13:36 UTC on 21 September. The CME was related to the M8.7 flare from NOAA AR 3435. The CME speed was estimated to be around 500 km/s, with the bulk of the material directed to the south. Since the source is located close to disk center, an impact at Earth can be expected on 25 September.

A second wide CME was observed right after the first one, directed towards the NE, this CME is backside and will not affect the Earth.

Reference for this alert

All Presto solar alerts