Viewing archive of Monday, 25 May 2020
Solar activity report
Report of Solar-Geophysical Activity 2020 May 25 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 146 Issued at 2200Z on 25 May 2020IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 0 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (26 May, 27 May, 28 May).
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 349 km/s at 25/0430Z. Total IMF reached 7 nT at
24/2244Z. The maximum southward component of Bz reached -6 nT at
24/2254Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 197 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on days one, two, and three (26 May, 27 May, 28
May).
III. Event Probabilities 26 May to 28 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 May 070 Predicted 26 May-28 May 070/070/070 90 Day Mean 25 May 070
V. Geomagnetic A Indices
Observed Afr/Ap 24 May 005/005 Estimated Afr/Ap 25 May 005/006 Predicted Afr/Ap 26 May-28 May 005/005-006/005-005/005
VI. Geomagnetic Activity Probabilities 26 May to 28 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/03/30 | X1.5 |
| Last M-flare | 2026/04/09 | M1.0 |
| Last geomagnetic storm | 2026/04/20 | Kp5 (G1) |
| 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 | 79.3 -6.7 |
| Last 30 days | 92.4 +29.5 |
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