Viewing archive of Wednesday, 24 April 2013
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2013 Apr 24 1147 UTC
SIDC Forecast
Solar flares
Eruptive (C-class flares expected, probability >= 50%)
Geomagnetism
Quiet (A<20 and K<4)
Solar protons
Quiet
| 10cm flux | Ap | |
|---|---|---|
| 24 Apr 2013 | 121 | 022 |
| 25 Apr 2013 | 124 | 017 |
| 26 Apr 2013 | 126 | 007 |
Bulletin
Enhanced geomagnetic conditions are imminent as a result from a high speed solar wind outflow from a recurrent coronal hole in the Southern solar hemisphere. Meanwhile, the flaring potential of NOAA active region 1726 is decreasing, yet major C-flares are still possible.
Today's estimated international sunspot number (ISN): 062, based on 20 stations.Solar indices for 23 Apr 2013
| Wolf number Catania | /// |
| 10cm solar flux | 118 |
| AK Chambon La Forêt | 016 |
| AK Wingst | 008 |
| Estimated Ap | 007 |
| Estimated international sunspot number | 054 - Based on 20 stations |
Noticeable events summary
| Day | Begin | Max | End | Loc | Strength | OP | 10cm | Radio burst types | Catania/NOAA | |
|---|---|---|---|---|---|---|---|---|---|---|
| None | ||||||||||
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
All times in UTC
Latest news
X1.5 solar flare
M2.7 solar flare, CME arrival possible
Complex sunspot region 4366
Latest forum messages
Support SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Solar activity or if there is a chance to see the aurora, but with more traffic comes higher costs to keep the servers online. If you like SpaceWeatherLive and want to support the project you can choose a subscription for an ad-free site or consider a donation. With your help we can keep SpaceWeatherLive online!
Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| Last geomagnetic storm | 2026/04/03 | Kp7- (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2026 | 85.9 +7.7 |
| April 2026 | 94.2 +8.3 |
| Last 30 days | 94.7 +35.4 |