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Solar activity report
Report of Solar-Geophysical Activity 2022 May 20 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 140 Issued at 2200Z on 20 May 2022IA. Analysis of Solar Active Regions and Activity from 19-2100Z to 20-2100Z Solar activity has been at moderate levels for the past 24
hours. The largest solar event of the period was a M3 event observed at
20/0745Z from Region 3014 (N24W09). There are currently 7 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 (21 May, 22 May,
23 May).
IIA. Geophysical Activity Summary 19-2100Z to 20-2100Z
The geomagnetic
field has been at quiet to unsettled levels for the past 24 hours. Solar
wind speed reached a peak of 608 km/s at 20/1541Z. Total IMF reached 7
nT at 20/1845Z. The maximum southward component of Bz reached -6 nT at
20/1540Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 225 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to unsettled levels on days one and two (21 May, 22 May)
and quiet levels on day three (23 May). Protons greater than 10 Mev have
a slight chance of crossing threshold on days two and three (22 May, 23
May).
III. Event Probabilities 21 May to 23 May
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 10% | 10% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 20 May 166 Predicted 21 May-23 May 160/162/165 90 Day Mean 20 May 124
V. Geomagnetic A Indices
Observed Afr/Ap 19 May 010/009 Estimated Afr/Ap 20 May 011/012 Predicted Afr/Ap 21 May-23 May 007/010-007/010-005/005
VI. Geomagnetic Activity Probabilities 21 May to 23 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 10% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 30% | 30% | 20% |
| Major-severe storm | 30% | 30% | 20% |
All times in UTC
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