Viewing archive of Saturday, 31 August 2013
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2013 Aug 31 1204 UTC
SIDC Forecast
Solar flares
Eruptive (C-class flares expected, probability >=50%)
Geomagnetism
Minor storm expected (A>=30 or K=5)
Solar protons
Quiet
| 10cm flux | Ap | |
|---|---|---|
| 31 Aug 2013 | 108 | 011 |
| 01 Sep 2013 | 109 | 017 |
| 02 Sep 2013 | 110 | 011 |
Bulletin
Solar activity was quiet the last 24 hours, but eruptive conditions are expected especially from AR NOAA 11835 has a possibility in producing an M-class flare. Current Solar Wind speed is around 420 km/s and the interplanetary magnetic filed Bz component is around -5 nT. Geomagnetic conditions where quiet in the past 24 hours, but are expected to reach up to minor storm (K=5) levels in the evening of August 31st.
Today's estimated international sunspot number (ISN): 049, based on 15 stations.Solar indices for 30 Aug 2013
| Wolf number Catania | /// |
| 10cm solar flux | 108 |
| AK Chambon La Forêt | 025 |
| AK Wingst | 012 |
| Estimated Ap | 012 |
| Estimated international sunspot number | 046 - Based on 23 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
Current data suggests there is a slight possibility for aurora to appear at the following high latitude regions in the near future
Gillam, MB, Iqaluit, NUNuuk
Reykjavik
Latest news
X1.1 solar flare
Coronal hole faces Earth
Strong G3 geomagnetic storm watch for 23 March
Latest forum messages
Support SpaceWeatherLive.com!
A lot of people come to SpaceWeatherLive to follow the Sun's activity or if there is aurora to be seen, but with more traffic comes higher server costs. Consider a donation if you enjoy SpaceWeatherLive so we can keep the website online!
Latest alerts
Thursday, 10 April 2025
23:00 UTC - Geomagnetic activity
Active geomagnetic conditions (Kp4) Threshold Reached: 22:47 UTC
20:45 UTC - Hemispheric Power Index
The OVATION model predicts the Hemispheric Power Index to reach 50GW at 21:37 UTC
01:45 UTC - Geomagnetic activity
Active geomagnetic conditions (Kp4) Threshold Reached: 01:41 UTC
Wednesday, 9 April 2025
08:12 UTC - Hemispheric Power Index
The OVATION model predicts the Hemispheric Power Index to reach 76GW at 08:57 UTC
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/08 | M1.5 |
| Last geomagnetic storm | 2025/04/06 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 144.7 +10.5 |
| Last 30 days | 138.8 +1.3 |