Viewing archive of Sunday, 26 May 2013
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2013 May 26 1203 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 | |
|---|---|---|
| 26 May 2013 | 123 | 017 |
| 27 May 2013 | 125 | 007 |
| 28 May 2013 | 125 | 007 |
Bulletin
Only 2 C-class flares were recorded in the last 24 hours. Solar activity is expected to remain eruptive. A M-class flare is still possible. Solar wind speed is currently around 700 km/s, but the interplanetary magnetic field Bz component is around 0 nT. Geomagnetic activity has reached active to storm levels in the last 24 hours, but is expected to calm down to quiet levels in the evening of May 26th. It is expected to remain quiet for the next 48 hours.
Today's estimated international sunspot number (ISN): 067, based on 08 stations.Solar indices for 25 May 2013
| Wolf number Catania | /// |
| 10cm solar flux | 121 |
| AK Chambon La Forêt | 047 |
| AK Wingst | 033 |
| Estimated Ap | 037 |
| Estimated international sunspot number | 078 - Based on 20 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
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 | 2026/04/04 | M1.3 |
| 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 | 133.3 +47.4 |
| Last 30 days | 96.9 +35.1 |