Viewing archive of Sunday, 28 March 2021
Solar activity report
Report of Solar-Geophysical Activity 2021 Mar 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 87 Issued at 2200Z on 28 Mar 2021IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity has been at very low levels for the past 24
hours. There are currently 1 numbered sunspot regions on the disk.
IB. Solar Activity Forecast
Solar activity is expected to be very low
on days one, two, and three (29 Mar, 30 Mar, 31 Mar).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic
field has been at quiet to active levels for the past 24 hours. Solar
wind speed reached a peak of 440 km/s at 28/0611Z. Total IMF reached 8
nT at 27/2217Z. The maximum southward component of Bz reached -7 nT at
28/0021Z. Electrons greater than 2 MeV at geosynchronous orbit reached
a peak level of 727 pfu.
IIB. Geophysical Activity Forecast
The geomagnetic field is expected
to be at quiet to minor storm levels on day one (29 Mar), quiet to
active levels on day two (30 Mar) and quiet to unsettled levels on day
three (31 Mar).
III. Event Probabilities 29 Mar to 31 Mar
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 Mar 075 Predicted 29 Mar-31 Mar 075/075/075 90 Day Mean 28 Mar 076
V. Geomagnetic A Indices
Observed Afr/Ap 27 Mar 007/007 Estimated Afr/Ap 28 Mar 008/010 Predicted Afr/Ap 29 Mar-31 Mar 013/018-010/012-007/008
VI. Geomagnetic Activity Probabilities 29 Mar to 31 Mar
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 40% | 20% |
| Minor storm | 30% | 20% | 10% |
| Major-severe storm | 05% | 05% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 15% |
| Minor storm | 25% | 30% | 25% |
| Major-severe storm | 60% | 50% | 25% |
All times in UTC
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