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Daily bulletin on solar and geomagnetic activity from the SIDC
Emesso: 2013 Sep 27 1247 UTC
SIDC Forecast
Brillamenti solari
Quiet conditions (<50% probability of C-class flares)
Geomagnetism
Quiet (A<20 and K<4)
Protoni solari
Quiet
| 10cm flux | Ap | |
|---|---|---|
| 27 Sep 2013 | 107 | 006 |
| 28 Sep 2013 | 105 | 006 |
| 29 Sep 2013 | 103 | 008 |
Bulletin
Flaring activity is in the B-level. We don't expect it to change. A large filament is now at the central meridian. It is stable up to now. A coronal hole in visible in the northern hemisphere between 35° and 50° latitude, around 25° wide. It reached the central meridian yesterday, September 26. The coronal hole is not recurrent. Geomagnetic influence is possible in 2-3 days. At the moment, the geomagnetic conditions are quiet.
Today's estimated international sunspot number (ISN): 041, based on 19 stations.Solar indices for 26 Sep 2013
| Wolf number Catania | 090 |
| 10cm solar flux | 110 |
| AK Chambon La Forêt | 003 |
| AK Wingst | 001 |
| Estimated Ap | 001 |
| Estimated international sunspot number | 037 - Based on 25 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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X1.5 solar flare
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Notizie sul meteo spaziale
| Ultimo brillamento X | 2026/03/30 | X1.5 |
| Ultimo brillamento M | 2026/04/04 | M1.0 |
| Ultima tempesta geomagnetica | 2026/04/03 | Kp7- (G3) |
| 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 | |
|---|---|
| marzo 2026 | 85.9 +7.7 |
| aprile 2026 | 121 +35.1 |
| Ultimi 30 giorni | 101.1 +44.7 |