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Daily bulletin on solar and geomagnetic activity from the SIDC
Emesso: 2013 Aug 04 1224 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 | |
|---|---|---|
| 04 Aug 2013 | 106 | 010 |
| 05 Aug 2013 | 105 | 010 |
| 06 Aug 2013 | 104 | 005 |
Bulletin
Flaring activity is low. The X-ray background radiation is situated in the lower part of the B-level. The geomagnetic conditions are quiet. The Earth crossed a solar sector boundary. The interplanetary magnetic field (IMF) jumped to values above 10nT. The north-south (Bz) component is however small and positive. Unsettled conditions are possible, depending on the behaviour of the Bz component of the IMF.
Today's estimated international sunspot number (ISN): 058, based on 19 stations.Solar indices for 03 Aug 2013
| Wolf number Catania | /// |
| 10cm solar flux | 107 |
| AK Chambon La Forêt | 009 |
| AK Wingst | 006 |
| Estimated Ap | 004 |
| Estimated international sunspot number | 069 - Based on 20 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 | 2026/04/09 | 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 | 94.2 +8.3 |
| Ultimi 30 giorni | 94.7 +35.4 |