Viewing archive of Wednesday, 22 May 2013
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2013 May 22 1205 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 | |
|---|---|---|
| 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 | End | Loc | Strength | OP | 10cm | Catania/NOAA | Radio burst types | |
|---|---|---|---|---|---|---|---|---|---|---|
| None | ||||||||||
Provided by the Solar Influences Data analysis Center© - SIDC - Processed by SpaceWeatherLive
All times in UTC
Latest news
Complex sunspot region 4366
CME impact! S4 solar radiation storm
X1.9 solar flare with earth-directed CME
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 | 2026/02/04 | X4.3 |
| Last M-flare | 2026/02/12 | M1.4 |
| Last geomagnetic storm | 2026/02/05 | Kp5+ (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| January 2026 | 112.6 -11.4 |
| February 2026 | 125.3 +12.7 |
| Last 30 days | 130.4 +32.7 |