Viewing archive of Sunday, 25 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 25 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 206 Issued at 2200Z on 25 Jul 2010IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity was very low. A single low-level B-class
flare occurred. Region 1089 (S24W08) continued a gradual decrease in
area and spot number. No new regions were assigned.
IB. Solar Activity Forecast
Solar activity is expected to be very
low. However, there is a slight chance for an isolated C-class flare
from Region 1089.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
Geomagnetic field activity was at quiet to briefly unsettled levels.
ACE solar wind readings indicated velocities gradually increased
from 333 to 483 km/s during the period. The enhanced velocities were
associated with a recurrent coronal hole high-speed stream.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet to unsettled levels on day 1 (26 July).
Activity is expected to increase to unsettled to active levels with
a slight chance for minor storm levels on day 2 (27 July) as the
recurrent coronal hole high-speed wind stream intensifies. Activity
is expected to decrease to quiet to unsettled levels on day 3 (28
July) as coronal hole effects gradually subside.
III. Event Probabilities 26 Jul to 28 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | Green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Jul 085 Predicted 26 Jul-28 Jul 084/084/082 90 Day Mean 25 Jul 075
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jul 004/005 Estimated Afr/Ap 25 Jul 006/008 Predicted Afr/Ap 26 Jul-28 Jul 008/010-012/015-008/010
VI. Geomagnetic Activity Probabilities 26 Jul to 28 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 25% | 15% |
| Minor storm | 05% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 30% | 20% |
| Minor storm | 05% | 15% | 05% |
| Major-severe storm | 01% | 05% | 01% |
All times in UTC
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