Viewing archive of Friday, 10 April 2009
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 2009 Apr 10 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 100 Issued at 2200Z on 10 Apr 2009IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z Solar activity was very low. No flares occurred during
the past 24 hours. The solar disk continues to void of sunspots.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
The geomagnetic field was quiet to unsettled during the past 24
hours. Solar wind velocity continued to increase but appears to be
leveling out at this time in the range between 500-540 km/s. The
interplanetary magnetic field Bz component fluctuated between +/- 4
nT. The signatures in the solar wind continue to be consistent with
a high speed stream from a coronal hole.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for the next three days.
III. Event Probabilities 11 Apr to 13 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 10 Apr 069 Predicted 11 Apr-13 Apr 070/070/070 90 Day Mean 10 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 09 Apr 009/012 Estimated Afr/Ap 10 Apr 007/007 Predicted Afr/Ap 11 Apr-13 Apr 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 11 Apr to 13 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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