Viewing archive of Friday, 23 July 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 Jul 23 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 204 Issued at 2200Z on 23 Jul 2010IA. Analysis of Solar Active Regions and Activity from 22-2100Z to 23-2100Z Solar activity was very low. Todays activity consisted
of a few B-class flares, including a B9 at 2138Z and a B9 at 1523Z,
both from Region 1089 (S24E20). Region 1089 continues to slowly
decay and simplify.
IB. Solar Activity Forecast
Solar activity is expected to be very
low. However, there is a chance for an isolated C-class flare from
Region 1089.
IIA. Geophysical Activity Summary 22-2100Z to 23-2100Z
The geomagnetic field was mostly quiet. Solar wind data from the ACE
spacecraft indicate elevated density during the last 4 hours of the
period, consistent with a co-rotating interaction region.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be unsettled for the first day (24 July) in response to
a favorably positioned coronal hole. Quiet to unsettled levels are
expected for the 2nd and 3rd days (25-26 July) due to persistent
effects from the coronal hole.
III. Event Probabilities 24 Jul to 26 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 23 Jul 086 Predicted 24 Jul-26 Jul 083/081/080 90 Day Mean 23 Jul 075
V. Geomagnetic A Indices
Observed Afr/Ap 22 Jul 004/005 Estimated Afr/Ap 23 Jul 005/007 Predicted Afr/Ap 24 Jul-26 Jul 010/010-007/008-007/008
VI. Geomagnetic Activity Probabilities 24 Jul to 26 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 20% | 20% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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