NOAA 2035, already behind the west limb, produced an X1.3 flare peaking at 00:27 UT. No obvious proton flux increase has been observed so far. The event was accompanied by an EIT-wave towards the south (PROBA2/SWAP) and a CME (SOHO/LASCO and STEREO). The CME has a speed of about 500 km/s (CACTUS) and is directed away from Earth. There are currently 5 sunspot regions on disk. They are all quite small and have a quite simple magnetic configuration. An active region, responsible for backside CMEs on 22 and 25 April, is approaching the southeast limb.
There’s still a chance on a C-class flare, in particular from the regions near the solar limb. There’s a decreasing chance on a strong flare from NOAA 2035 as it rotates further onto the Sun’s farside.
Solar wind speed varied between 400 and 500km/s, and Bz between -5 and +4nT being mostly negative between 21:00 and 01:00UT. Hence, quiet geomagetic conditions were observed, with locally a brief active period. A small equatorial coronal hole passed the central meridian last night. The geomagnetic field may be impacted starting around 27 April. Geomagnetic conditions are expected to be quiet, with locally a brief active interval possible.
Equipment: Coronado 90 + Imaging Source DMK + LX75
Processing: Photoshop, Avistack 300 frames
Time UT: 14:00
Exposure 1/500 sec.
With SPONLI Space is getting closer