Viewing archive of Wednesday, 29 April 2026
Solar activity report
Report of Solar-Geophysical Activity 2026 Apr 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 119 Issued at 2200Z on 29 Apr 2026IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at low levels for the past 24 hours.
There are currently 6 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is likely to be moderate
with a slight chance for an X-class flare on days one, two, and three
(30 Apr, 01 May, 02 May).
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic
field has been at quiet levels for the past 24 hours. Solar wind speed
reached a peak of 367 km/s at 28/2137Z. Total IMF reached 6 nT at
29/1732Z. The maximum southward component of Bz reached -3 nT at
29/1622Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 459 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (30 Apr), quiet to unsettled
levels on day two (01 May) and quiet levels on day three (02 May).
Protons have a slight chance of crossing threshold on days one, two, and
three (30 Apr, 01 May, 02 May).
III. Event Probabilities 30 Apr to 02 May
| Class M | 65% | 65% | 65% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Apr 143 Predicted 30 Apr-02 May 140/135/132 90 Day Mean 29 Apr 129
V. Geomagnetic A Indices
Observed Afr/Ap 28 Apr 003/003 Estimated Afr/Ap 29 Apr 003/004 Predicted Afr/Ap 30 Apr-02 May 010/014-007/008-005/005
VI. Geomagnetic Activity Probabilities 30 Apr to 02 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 15% | 15% |
| Minor storm | 15% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 20% | 15% |
| Major-severe storm | 20% | 20% | 10% |
All times in UTC
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Latest forum messages
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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 +6.3 |
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