Välja antud: 2017 Apr 07 1230 UTC
C-class flares expected, (probability >=50%)
Quiet (A<20 and K<4)
Quiet
10cm flux | Ap | |
---|---|---|
07 Apr 2017 | 072 | 008 |
08 Apr 2017 | 070 | 005 |
09 Apr 2017 | 072 | 009 |
Solar activity was at low levels during the period. Two C-class flares were recorded: a C5.5 flare at the very beginning of the period (12:10UT), and a C2.7 event peaking at 00:25UT. Both flares originated from NOAA 2645's trailing portion, which is now very close to the west limb. No earth-directed coronal mass ejections (CMEs) were observed in available coronagraphic imagery. The greater than 10MeV proton flux was at nominal levels.
C-class flaring remains possible, with a small chance on an isolated M-class flare.
Solar wind speed gradually decreased from an initial 490 km/s to 420 km/s by the end of the period. Bz fluctuated between -5 and +4 nT. The interplanetary magnetic field was mostly directed towards the Sun. The particle stream from a narrow extension from the positive polar coronal hole may affect the earth environment on 9 or 10 April.
The geomagnetic field was at quiet to unsettled levels and is expected to remain so, with only a small chance on an isolated active episode.
Today's estimated international sunspot number (ISN): 027, based on 16 stations.
Wolf number Catania | 044 |
10cm solar flux | 076 |
AK Chambon La Forêt | 014 |
AK Wingst | 009 |
Estimated Ap | 008 |
Estimated international sunspot number | 037 - Based on 27 stations |
Day | Begin | Max | Lõpp | Loc | Strength | OP | 10cm | Catania/NOAA | Radio burst types | |
---|---|---|---|---|---|---|---|---|---|---|
Puuduvad |
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
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