Viewing archive of Thursday, 25 June 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 Jun 25 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 176 Issued at 2200Z on 25 Jun 2009IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z Solar activity has been very low. No flares occurred
during the past 24 hours. Region 1023 (S23W14) has decayed to
spotless plage. Consequently the entire solar disk is now void of
spots.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
The geomagnetic field was quiet to unsettled. Solar wind
observations indicated the presence of a high speed stream from a
coronal hole. Solar wind velocities were slowly declining towards
the end of the period.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for the next two days (26-27 June). An
increase to predominately unsettled levels with a chance for
isolated active periods is expected on the third day (28 June) in
response to a favorably positioned coronal hole.
III. Event Probabilities 26 Jun to 28 Jun
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 25 Jun 068 Predicted 26 Jun-28 Jun 068/068/068 90 Day Mean 25 Jun 070
V. Geomagnetic A Indices
Observed Afr/Ap 24 Jun 016/019 Estimated Afr/Ap 25 Jun 006/008 Predicted Afr/Ap 26 Jun-28 Jun 005/005-005/005-008/010
VI. Geomagnetic Activity Probabilities 26 Jun to 28 Jun
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 25% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 30% |
| Minor storm | 01% | 01% | 15% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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