Viewing archive of Friday, 9 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 09 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 099 Issued at 2200Z on 09 Apr 2010IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity was very low. Although spotless, Region
1060 (N25W13) did produce a B3/sf event at 09/0455Z. Region 1061
(N13W69) continues to decay and is currently a H-type spot group.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
The geomagnetic field was quiet to unsettled. The solar wind
observed at the ACE spacecraft indicates a continued decline in
solar wind speed averaging 440 km/s. The greater than 2MeV
electrons at geosynchronous orbit reached very high levels today.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for days one and two (10-11 April). Quiet to
unsettled conditions, with isolated active periods, are expected for
day three (12 April). This activity is expected due to the full
halo CME observed on 08 April.
III. Event Probabilities 10 Apr to 12 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Apr 076 Predicted 10 Apr-12 Apr 075/075/075 90 Day Mean 09 Apr 082
V. Geomagnetic A Indices
Observed Afr/Ap 08 Apr 009/011 Estimated Afr/Ap 09 Apr 006/008 Predicted Afr/Ap 10 Apr-12 Apr 005/005-005/005-010/012
VI. Geomagnetic Activity Probabilities 10 Apr to 12 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 01% | 01% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 01% | 01% | 25% |
| Minor storm | 01% | 01% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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