Viewing archive of Monday, 28 May 2012
Solar activity report
Any mentioned solar flare in this report has a scaling factor applied by the Space Weather Prediction Center (SWPC). Because of the SWPC scaling factor, solar flares are reported as 42% smaller than for the science quality data. The scaling factor has been removed from our archived solar flare data to reflect the true physical units.
Report of Solar-Geophysical Activity 2012 May 28 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 28 May 2012IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z Solar activity was very low. Region 1491 (N22W70)
produced a B7 flare at 28/1249Z, which was the largest flare of the
period. Region 1490 (S13E04) produced three nominal B-class flares
during the period. A CME associated with a filament eruption was
observed in LASCO C2 imagery at 28/0800Z off of the northwest
quadrant of the solar disk. The CME does not appear to be Earth
directed.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low for the next three days (29-31 May).
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
The geomagnetic field was quiet to unsettled. The greater than 2 MeV
electron flux at geosynchronous orbit reached high levels during the
period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be mostly quiet for the next three days (29-31 May).
III. Event Probabilities 29 May to 31 May
| Class M | 05% | 05% | 05% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 28 May 110 Predicted 29 May-31 May 110/110/110 90 Day Mean 28 May 117
V. Geomagnetic A Indices
Observed Afr/Ap 27 May 003/005 Estimated Afr/Ap 28 May 005/007 Predicted Afr/Ap 29 May-31 May 004/005-004/005-004/005
VI. Geomagnetic Activity Probabilities 29 May to 31 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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