Viewing archive of Friday, 27 March 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Mar 27 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 86 Issued at 2200Z on 27 Mar 2026IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 9 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be low with
a chance for M-class flares on days one, two, and three (28 Mar, 29 Mar,
30 Mar).
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 522 km/s at 27/1504Z. Total IMF reached 5 nT at
27/0200Z. The maximum southward component of Bz reached -4 nT at
27/2058Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 12784 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet levels on day one (28 Mar), quiet to unsettled levels on
day two (29 Mar) and quiet to active levels on day three (30 Mar).
III. Event Probabilities 28 Mar to 30 Mar
| Class M | 45% | 45% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Mar 156 Predicted 28 Mar-30 Mar 158/155/155 90 Day Mean 27 Mar 140
V. Geomagnetic A Indices
Observed Afr/Ap 26 Mar 007/010 Estimated Afr/Ap 27 Mar 007/007 Predicted Afr/Ap 28 Mar-30 Mar 006/005-007/008-013/015
VI. Geomagnetic Activity Probabilities 28 Mar to 30 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 35% |
| Minor storm | 01% | 05% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 20% | 25% | 25% |
| Major-severe storm | 20% | 25% | 50% |
All times in UTC
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Space weather facts
| Last X-flare | 2026/06/03 | X1.0 |
| Last M-flare | 2026/06/03 | M7.9 |
| Last geomagnetic storm | 2026/05/16 | Kp6- (G2) |
| Spotless days | |
|---|---|
| Last 365 days | 3 days |
| 2026 | 3 days (2%) |
| Last spotless day | 2026/02/24 |
| Monthly mean Sunspot Number | |
|---|---|
| April 2026 | 79.3 -6.6 |
| June 2026 | 139.5 +60.2 |
| Last 30 days | 97.8 +5.2 |
