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Daily bulletin on solar and geomagnetic activity from the SIDC
Emesso: 2013 May 22 1205 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 | |
|---|---|---|
| 22 May 2013 | 127 | 008 |
| 23 May 2013 | 128 | 007 |
| 24 May 2013 | 130 | 007 |
Bulletin
Solar activity was eruptive the last 24 hours with 6 C-class flares, with the largest one a C2.9 flare from AR NOAA 1756. NOAA 1748 (Catania 75) has become less complex and has only a small chance in producing an M-class flare. Geomagnetic conditions where quiet to moderate and are expected to remain so for the next 48 hours.
Today's estimated international sunspot number (ISN): 084, based on 11 stations.Solar indices for 21 May 2013
| Wolf number Catania | /// |
| 10cm solar flux | 125 |
| AK Chambon La Forêt | 012 |
| AK Wingst | 006 |
| Estimated Ap | 007 |
| Estimated international sunspot number | 083 - Based on 11 stations |
Noticeable events summary
| Day | Begin | Max | Fine | Loc | Strength | OP | 10cm | Catania/NOAA | Radio burst types | |
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | X1.4 |
| Ultimo brillamento M | 2026/03/28 | M1.3 |
| Ultima tempesta geomagnetica | 2026/03/25 | Kp5+ (G1) |
| Giorni senza macchie | |
|---|---|
| Ultimi 365 giorni | 3 giorni |
| 2026 | 3 giorni (3%) |
| Ultimo giorno senza macchie | 2026/02/24 |
| Media mensile Numero di Macchie Solari | |
|---|---|
| febbraio 2026 | 78.2 -34.3 |
| marzo 2026 | 86.6 +8.4 |
| Ultimi 30 giorni | 86.6 +11.2 |