Viewing archive of Sunday, 9 August 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 Aug 09 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 221 Issued at 2200Z on 09 Aug 2009IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z Solar activity was very low. No flares were observed.
The visible disk remained spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
Geomagnetic field activity was at quiet to unsettled levels. ACE
solar wind data indicated the unsettled conditions observed during
09/0300 - 0900Z were associated with a period of sustained southward
IMF Bz (minimum -4 nT at 09/0300Z). Solar wind velocities ranged
from 408 - 481 km/sec during the period.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet to unsettled levels with a chance for active
levels on day 1 (10 August) due to a recurrent coronal hole
high-speed stream. Activity is expected to decrease to quiet levels
during days 2 - 3 (11 -12 August) as the high-speed stream subsides.
III. Event Probabilities 10 Aug to 12 Aug
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 09 Aug 067 Predicted 10 Aug-12 Aug 067/067/067 90 Day Mean 09 Aug 069
V. Geomagnetic A Indices
Observed Afr/Ap 08 Aug 002/004 Estimated Afr/Ap 09 Aug 007/007 Predicted Afr/Ap 10 Aug-12 Aug 007/007-005/005-005/005
VI. Geomagnetic Activity Probabilities 10 Aug to 12 Aug
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 10% | 10% |
| Minor storm | 10% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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