Viewing archive of Monday, 7 September 2015
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2015 Sep 07 1231 UTC
SIDC Forecast
Solar flares
Quiet conditions (<50% probability of C-class flares)
Geomagnetism
Quiet (A<20 and K<4)
Solar protons
Quiet
| 10cm flux | Ap | |
|---|---|---|
| 07 Sep 2015 | 086 | 010 |
| 08 Sep 2015 | 087 | 009 |
| 09 Sep 2015 | 085 | 008 |
Bulletin
Solar activity remains to be low, with no flares above the B-level reported since September 03. We expect this low solar activity to persist with possibility of only an isolated C-class flares in the coming hours. No Earth directed CMEs were observed in the last 24 hours.
The Earth is still inside the fast flow with the solar wind speed of about 500 km/s. The interplanetary magnetic field magnitude is rather stable having the value of about 7 nT. The geomagnetic conditions are currently quiet to unsettled and we expect it to remain so in the coming hours.
Today's estimated international sunspot number (ISN): 043, based on 18 stations.Solar indices for 06 Sep 2015
| Wolf number Catania | /// |
| 10cm solar flux | 086 |
| AK Chambon La Forêt | 026 |
| AK Wingst | 017 |
| Estimated Ap | 018 |
| Estimated international sunspot number | 043 - Based on 27 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 | 2026/04/09 | 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 | 97.2 +11.3 |
| Last 30 days | 95.6 +37.2 |