Viewing archive of Tuesday, 23 November 2021
Daily bulletin on solar and geomagnetic activity from the SIDC
Issued: 2021 Nov 23 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 | |
|---|---|---|
| 23 Nov 2021 | 078 | 007 |
| 24 Nov 2021 | 078 | 007 |
| 25 Nov 2021 | 078 | 007 |
Bulletin
Two active regions visible on the Sun (alpha magnetic field configuration). There have been no C-class flares in the past 24 hours, no changes are expected in the next 24 hours.
No Earth directed CMEs have been observed in coronagraph data.
The greater than 10 MeV proton flux was at nominal levels in the past 24 hours, and is expected to stay at nominal levels in the next 24 hours. The greater than 2 MeV electron flux was at nominal levels in the past 24 hours, and is expected to stay so in the next 24 hours. The greater than 2 MeV electron fluence was at normal levels in the past 24 hours, and is expected to stay at normal levels in the next 24 hours.
The solar wind speed as registered by DSCOVR is around 510 km/s. The Interplanetary Magnetic Field near Earth (IMF) was oriented towards the Sun and its magnitude is about 4 nT. There were no extended intervals with Bz below -5 nT. The solar wind speed is expected to decrease in the next 24 hours. There are a couple of small coronal holes traversing the central meridian, so speeds may go back up in about 48 hours.
Quiet to unsettled geomagnetic conditions (K-BEL between 1 and 3, Kp between 1 and 2) were registered in the past 24 hours. Similar conditions are expected for the next 24 hours.
Today's estimated international sunspot number (ISN): 032, based on 11 stations.Solar indices for 22 Nov 2021
| Wolf number Catania | /// |
| 10cm solar flux | 078 |
| AK Chambon La Forêt | 014 |
| AK Wingst | 010 |
| Estimated Ap | 009 |
| Estimated international sunspot number | 023 - Based on 22 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 | M2.4 |
| 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 | 147 -7.6 |
| Last 30 days | 128.8 -21.8 |