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Daily bulletin on solar and geomagnetic activity from the SIDC
Emesso: 2013 Jan 21 1232 UTC
SIDC Forecast
Brillamenti solari
Eruptive (C-class flares expected, probability >= 50%)
Geomagnetism
Quiet (A<20 and K<4)
Protoni solari
Quiet
| 10cm flux | Ap | |
|---|---|---|
| 21 Jan 2013 | 106 | 003 |
| 22 Jan 2013 | 105 | 004 |
| 23 Jan 2013 | 107 | 003 |
Bulletin
Three sunspot groups are reported by NOAA today: NOAA ARs 1654, 1658 (Catania numbers 64 and 69 respectively), and 1660 (no Catania number yet). A C-class flare is possible in the newly emerged NOAA AR 1660. The Earth is currently inside a slow (around 350 km/s) solar wind flow with weak to average (3-4 nT) interplanetary magnetic field magnitude. We expect quiet geomagnetic conditions.
Today's estimated international sunspot number (ISN): 035, based on 03 stations.Solar indices for 20 Jan 2013
| Wolf number Catania | /// |
| 10cm solar flux | 107 |
| AK Chambon La Forêt | 014 |
| AK Wingst | 011 |
| Estimated Ap | 011 |
| Estimated international sunspot number | 031 - Based on 06 stations |
Noticeable events summary
| Day | Begin | Max | Fine | Loc | Strength | OP | 10cm | Radio burst types | Catania/NOAA | |
|---|---|---|---|---|---|---|---|---|---|---|
| Nessuna | ||||||||||
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
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Notizie sul meteo spaziale
| Ultimo brillamento X | 2026/03/30 | X1.5 |
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|---|---|
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