Viewing archive of Saturday, 17 January 2015
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2015 Jan 17 1425 UTC
SIDC Forecast
Solar flares
Eruptive (C-class flares expected, probability >=50%)
Geomagnetism
Active conditions expected (A>=20 or K=4)
Solar protons
Quiet
| 10cm flux | Ap | |
|---|---|---|
| 17 Jan 2015 | 125 | 007 |
| 18 Jan 2015 | 120 | 013 |
| 19 Jan 2015 | 115 | 007 |
Bulletin
Solar activity is very low, no C-class flares in past 24h. No significant flares are expected in the next 48h. Geomagnetic conditions are quiet and expected to remain so. The arrival of a fast speed stream form a small equatorial coronal hole is expected within 24h, only active conditions should be reached.
Today's estimated international sunspot number (ISN): 032, based on 14 stations.Solar indices for 16 Jan 2015
| Wolf number Catania | 085 |
| 10cm solar flux | 125 |
| AK Chambon La Forêt | 014 |
| AK Wingst | 006 |
| Estimated Ap | 006 |
| Estimated international sunspot number | 043 - Based on 17 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 | 101.7 +15.8 |
| Last 30 days | 97.2 +38.9 |