Viewing archive of Friday, 24 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 24 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 114 Issued at 2200Z on 24 Apr 2009IA. Analysis of Solar Active Regions and Activity from 23-2100Z to 24-2100Z Solar activity was very low. No flares were detected.
The visible disk was spotless.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 23-2100Z to 24-2100Z
Geomagnetic field activity was at quiet levels. However, a sudden
impulse (SI) occurred at approximately 24/0050Z (10 nT, as measured
by the Boulder-NOAA magnetometer). There was no obvious source for
the SI.
IIB. Geophysical Activity Forecast
Geomagnetic field activity is
expected to be at quiet levels through the forecast period (25 - 27
Apr).
III. Event Probabilities 25 Apr to 27 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 24 Apr 070 Predicted 25 Apr-27 Apr 070/070/070 90 Day Mean 24 Apr 070
V. Geomagnetic A Indices
Observed Afr/Ap 23 Apr 000/003 Estimated Afr/Ap 24 Apr 004/005 Predicted Afr/Ap 25 Apr-27 Apr 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 25 Apr to 27 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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