Viewing archive of Thursday, 12 January 2017
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2017 Jan 12 1236 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 | |
|---|---|---|
| 12 Jan 2017 | 075 | 007 |
| 13 Jan 2017 | 076 | 007 |
| 14 Jan 2017 | 078 | 007 |
Bulletin
Solar activity has been very low, no C-class flares in past 24h, an active region rotating into view from the eastern limb may increase activity.
No Earth directed Coronal Mass Ejections (CMEs) have been detected. Solar protons have remained at background levels over the past 24 hours.
Geomagnetic conditions have ranged between K=2 and K=3. Solar wind speed is now at 390 km/s with interplanetary magnetic fields of 5 nT. There is a small equatorial coronal hole that could still affect the Earth today, but K is not expected to go above 4.
Today's estimated international sunspot number (ISN): 011, based on 12 stations.Solar indices for 11 Jan 2017
| Wolf number Catania | /// |
| 10cm solar flux | 075 |
| AK Chambon La Forêt | 014 |
| AK Wingst | 012 |
| Estimated Ap | 010 |
| Estimated international sunspot number | 000 - 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
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 | 2026/04/02 | M3.5 |
| Last geomagnetic storm | 2026/04/02 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (3%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2026 | 78.2 -34.3 |
| April 2026 | 141 +62.8 |
| Last 30 days | 94.6 +27 |