Viewing archive of Sunday, 13 April 2014
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2014 Apr 13 1209 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 | |
|---|---|---|
| 13 Apr 2014 | 140 | 013 |
| 14 Apr 2014 | 140 | 013 |
| 15 Apr 2014 | 143 | 007 |
Bulletin
The background level of the X-ray flux was at the B-class level and no C-class flares occurred during the past 24 hours. C-class flares can be expected from NOAA ARs 2034 and 2035. Geomagnetic conditions were unsettled. On April 13, unsettled to active conditions are still possible related to the arrival of the CH high speed stream.
Today's estimated international sunspot number (ISN): 053, based on 11 stations.Solar indices for 12 Apr 2014
| Wolf number Catania | /// |
| 10cm solar flux | 136 |
| AK Chambon La Forêt | 020 |
| AK Wingst | 018 |
| Estimated Ap | 022 |
| Estimated international sunspot number | 053 - Based on 19 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
CME arrival, G3 storm watch
X1.1 solar flare
Coronal hole faces Earth
Latest forum messages
More topicsSupport 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
18:57 UTC - Solar flare
Moderate M1.99 flare
18:39 UTC - Radio Blackout
Minor R1 radio blackout in progress (≥M1 - current: M1.93)
14:00 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 13:52 UTC
12:00 UTC - Geomagnetic activity
Minor G1 geomagnetic storm (Kp5) Threshold Reached: 11:42 UTC
09:39 UTC - Hemispheric Power Index
The OVATION model predicts the Hemispheric Power Index to reach 76GW at 10:30 UTC
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/21 | M1.9 |
| Last geomagnetic storm | 2025/04/20 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| March 2025 | 134.2 -20.4 |
| April 2025 | 119.2 -15 |
| Last 30 days | 113.3 -31 |