Viewing archive of Wednesday, 29 March 2023
Solar activity report
Report of Solar-Geophysical Activity 2023 Mar 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 88 Issued at 2200Z on 29 Mar 2023IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity has been at high levels for the past 24 hours.
The largest solar event of the period was a X1 event observed at
29/0233Z from Region 3256 (S22W74). 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
day one (30 Mar) and expected to be low with a slight chance for an
M-class flare on days two and three (31 Mar, 01 Apr).
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 429 km/s at 29/0700Z. Total IMF reached 9 nT at
29/1000Z. The maximum southward component of Bz reached -5 nT at
29/1258Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 3867 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to active levels on day one (30 Mar), unsettled to active
levels on day two (31 Mar) and quiet to unsettled levels on day three
(01 Apr). Protons greater than 10 Mev have a slight chance of crossing
threshold on day one (30 Mar).
III. Event Probabilities 30 Mar to 01 Apr
| Class M | 25% | 10% | 10% |
| Class X | 10% | 05% | 05% |
| Proton | 10% | 05% | 05% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Mar 148 Predicted 30 Mar-01 Apr 150/150/150 90 Day Mean 29 Mar 172
V. Geomagnetic A Indices
Observed Afr/Ap 28 Mar 004/005 Estimated Afr/Ap 29 Mar 005/005 Predicted Afr/Ap 30 Mar-01 Apr 012/018-013/018-014/016
VI. Geomagnetic Activity Probabilities 30 Mar to 01 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 35% | 40% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 10% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 45% | 50% | 50% |
All times in UTC
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| Last M-flare | 2024/11/08 | M1.4 |
| Last geomagnetic storm | 2024/10/12 | Kp5 (G1) |
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