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Daily bulletin on solar and geomagnetic activity from the SIDC
Emesso: 2013 Apr 28 1219 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 | |
|---|---|---|
| 28 Apr 2013 | 127 | 007 |
| 29 Apr 2013 | 127 | 007 |
| 30 Apr 2013 | 127 | 007 |
Bulletin
C-class flaring is expected, mainly from NOAA AR 1731, which has a beta- gamma configuration. Quiet geomagnetic conditions are expected.
Today's estimated international sunspot number (ISN): 069, based on 10 stations.Solar indices for 27 Apr 2013
| Wolf number Catania | /// |
| 10cm solar flux | 127 |
| AK Chambon La Forêt | 011 |
| AK Wingst | 009 |
| Estimated Ap | 007 |
| Estimated international sunspot number | 074 - Based on 16 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 |
| Ultimo brillamento M | 2026/04/09 | M1.0 |
| Ultima tempesta geomagnetica | 2026/04/03 | Kp7- (G3) |
| Giorni senza macchie | |
|---|---|
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