Viewing archive of Saturday, 25 April 2020
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2020 Apr 25 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 | |
|---|---|---|
| 25 Apr 2020 | 070 | 006 |
| 26 Apr 2020 | 070 | 007 |
| 27 Apr 2020 | 070 | 007 |
Bulletin
Solar X-ray flux remained below B level. The small plage region located around S07E45 developed some spots this morning but Solar flaring is overall expected to remain below C level over the next days.
There were no Earth directed Coronal Mass Ejections (CMEs) observed in the available coronagraphic imagery.
The greater than 10 MeV proton flux was at nominal levels over the past 24 hours and is expected to stay at nominal levels. The greater than 2 MeV electron flux has been slightly enhanced over the past 24 hours. The electron flux should be at background values over the next days as Solar wind has returned to a nominal slow Solar wind regime.
Solar wind conditions were near nominal. Solar wind speed overall increased slightly from around 370km/s to around 430 km/s. The total magnetic field was somewhat variable with a maximum of 8nT and a minimum of 1nT. Bz was variable and the magnetic field phi angle was mostly in the negative sector with some excursions into the positive sector. Near nominal Solar wind conditions are expected over the next days.
Geomagnetic conditions were quiet to unsettled (local KDourbes and NOAA Kp 1-3). Quiet geomagnetic conditions are expected over the next days with an occasional unsettled episode possible.
Today's estimated international sunspot number (ISN): 007, based on 17 stations.Solar indices for 24 Apr 2020
| Wolf number Catania | /// |
| 10cm solar flux | 071 |
| AK Chambon La Forêt | /// |
| AK Wingst | 012 |
| Estimated Ap | 009 |
| Estimated international sunspot number | 000 - Based on 33 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
X1.1 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!
Space weather facts
| Last X-flare | 2025/03/28 | X1.1 |
| Last M-flare | 2025/04/01 | M2.5 |
| Last geomagnetic storm | 2025/03/27 | Kp5 (G1) |
| Spotless days | |
|---|---|
| Last spotless day | 2022/06/08 |
| Monthly mean Sunspot Number | |
|---|---|
| February 2025 | 154.6 +17.6 |
| April 2025 | 152.5 -2.1 |
| Last 30 days | 130.7 -17.9 |