Viewing archive of Saturday, 24 April 2010
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 2010 Apr 24 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 114 Issued at 2200Z on 24 Apr 2010IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity was very low. No flares were observed
during the forecast period. The visible disk remained spotless.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low for the next 3 days (25-27 April).
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
The geomagnetic field was mostly quiet, with the exception of a brief
period of active to minor storm conditions observed between
24/00-06Z. The activity was due to nighttime sub-storming.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet on day one (25 April). Quiet to unsettled
levels are expected on days 2 and 3 (26-27 April) with isolated
active periods possible on day 3 in response to the CME observed on
22 April.
III. Event Probabilities 25 Apr to 27 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Apr 074 Predicted 25 Apr-27 Apr 075/080/080 90 Day Mean 24 Apr 081
V. Geomagnetic A Indices
Observed Afr/Ap 23 Apr 007/013 Estimated Afr/Ap 24 Apr 007/008 Predicted Afr/Ap 25 Apr-27 Apr 005/005-007/008-010/012
VI. Geomagnetic Activity Probabilities 25 Apr to 27 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 15% | 40% |
| Minor storm | 05% | 05% | 30% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 35% | 45% |
| Minor storm | 10% | 15% | 35% |
| Major-severe storm | 01% | 01% | 05% |
All times in UTC
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