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Solar activity report
Report of Solar-Geophysical Activity 2026 May 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 149 Issued at 2200Z on 29 May 2026IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at moderate 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 (30 May, 31 May,
01 Jun).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 482 km/s at 28/2140Z. Total IMF reached 8
nT at 29/1712Z. The maximum southward component of Bz reached -8 nT at
29/1604Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 565 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on days one and two (30 May, 31 May) and
quiet to unsettled levels on day three (01 Jun).
III. Event Probabilities 30 May to 01 Jun
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 May 148 Predicted 30 May-01 Jun 145/142/138 90 Day Mean 29 May 125
V. Geomagnetic A Indices
Observed Afr/Ap 28 May 013/013 Estimated Afr/Ap 29 May 010/013 Predicted Afr/Ap 30 May-01 Jun 009/010-011/015-010/012
VI. Geomagnetic Activity Probabilities 30 May to 01 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 30% | 20% |
| Minor storm | 05% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 15% |
| Minor storm | 35% | 35% | 25% |
| Major-severe storm | 30% | 35% | 30% |
All times in UTC
Latest news
Wednesday, 13 May 2026
Coronal hole faces Earth
Monday, 30 March 2026
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Tuesday, 17 March 2026
M2.7 solar flare, CME arrival possible
Latest forum messages
Forum messages 12Unspecified geomagnetic activity 283AR4446 (including AR4448/4449) 43AR 14452 14Incoming & Unnumbered Active Regions 437
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Space weather facts
| Last X-flare | 2026/04/24 | X2.5 |
| Last M-flare | 2026/05/29 | M1.1 |
| 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 |
| May 2026 | 97.9 +18.6 |
| Last 30 days | 97.9 +5 |
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