Viewing archive of Monday, 29 May 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 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 2023IA. 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.
The largest solar event of the period was a C6 event observed at
29/1829Z from Region 3315 (S16W34). There are currently 10 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
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 levels for the past 24 hours. Solar wind speed
reached a peak of 463 km/s at 28/2224Z. Total IMF reached 6 nT at
29/1613Z. The maximum southward component of Bz reached -4 nT at
29/1632Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 277 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (30 May), quiet to unsettled
levels on day two (31 May) and quiet levels on day three (01 Jun).
Protons have a slight chance of crossing threshold on days one, two, and
three (30 May, 31 May, 01 Jun).
III. Event Probabilities 30 May to 01 Jun
| Class M | 40% | 40% | 40% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 May 154 Predicted 30 May-01 Jun 150/140/135 90 Day Mean 29 May 153
V. Geomagnetic A Indices
Observed Afr/Ap 28 May 011/013 Estimated Afr/Ap 29 May 007/008 Predicted Afr/Ap 30 May-01 Jun 009/010-008/008-006/005
VI. Geomagnetic Activity Probabilities 30 May to 01 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 10% | 10% |
| Minor storm | 05% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 20% | 25% | 20% |
| Major-severe storm | 25% | 20% | 15% |
All times in UTC
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Space weather facts
| Last X-flare | 2024/11/06 | X2.3 |
| Last M-flare | 2024/11/07 | M2.3 |
| Last geomagnetic storm | 2024/10/12 | Kp5 (G1) |
| Spotless days | |
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| Monthly mean Sunspot Number | |
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| Last 30 days | 160.1 +7.7 |