Viewing archive of Monday, 21 July 2025
Solar activity report
Report of Solar-Geophysical Activity 2025 Jul 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 202 Issued at 2200Z on 21 Jul 2025IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 8 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares and a slight chance for an X-class flare on
day one (22 Jul) and expected to be low with a chance for M-class flares
on days two and three (23 Jul, 24 Jul).
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 634 km/s at 21/0723Z. Total IMF reached 6 nT at
21/1745Z. The maximum southward component of Bz reached -4 nT at
21/0008Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 13015 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and three (22 Jul, 24 Jul)
and quiet to minor storm levels on day two (23 Jul). Protons greater
than 10 Mev have a slight chance of crossing threshold on day one (22
Jul).
III. Event Probabilities 22 Jul to 24 Jul
| Class M | 40% | 35% | 30% |
| Class X | 10% | 05% | 05% |
| Proton | 10% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 21 Jul 143 Predicted 22 Jul-24 Jul 138/135/135 90 Day Mean 21 Jul 136
V. Geomagnetic A Indices
Observed Afr/Ap 20 Jul 007/ 005 Estimated Afr/Ap 21 Jul 005/004 Predicted Afr/Ap 22 Jul-24 Jul 009/012-017/025-013/015
VI. Geomagnetic Activity Probabilities 22 Jul to 24 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 35% | 35% |
| Minor storm | 15% | 25% | 15% |
| Major-severe storm | 01% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 25% | 25% | 25% |
| Major-severe storm | 50% | 55% | 50% |
All times in UTC
Latest news
Wednesday, 1 July 2026
X1.1 solar flare, G2 watch
Thursday, 4 June 2026
G3 geomagnetic storm watch for 4 and 5 June
Wednesday, 13 May 2026
Coronal hole faces Earth
Latest forum messages
AR4493 60SWL site and app frozen since july 21th 18z 6Dark aurora (channel)? 5Incoming & Unnumbered Active Regions 568Unspecified geomagnetic activity 367
More topicsSupport 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 | 2026/07/04 | X1.3 |
| Last M-flare | 2026/07/20 | M3.4 |
| Last geomagnetic storm | 2026/07/04 | Kp7+ (G3) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (1%) |
| Current stretch | 3 days |
| Monthly mean Sunspot Number | |
|---|---|
| June 2026 | 94.4 -7.1 |
| July 2026 | 70.7 -23.7 |
| Last 30 days | 85 -22.1 |
This day in history*
Aurora on this day in history
No observations submitted for this day in history. If you've observed the aurora and you have some amazing photos to show off, submit your observations now!
Submit your aurora observation