Viewing archive of Friday, 30 April 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 Apr 30 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 120 Issued at 2200Z on 30 Apr 2010IA. Analysis of Solar Active Regions and Activity from 29-2100Z to 30-2100Z Solar activity was low. Region 1064 (N15E28) was
numbered today and produced a B1 flare at 30/0021Z. The GOES-14
imagery observed a C2 x-ray flare at 30/1934Z. The source of this
event was located just beyond the NE limb of the sun.
IB. Solar Activity Forecast
Solar activity is expected to be very
low to low. There is a slight chance for a C-class flare from the
active area approaching the NE limb.
IIA. Geophysical Activity Summary 29-2100Z to 30-2100Z
The geomagnetic field was quiet.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet for days one and two (01-02 May). Quiet to
unsettled levels, with isolated active conditions, are expected on
day three (03 May) as a recurrent coronal hole high speed stream
becomes geoeffective.
III. Event Probabilities 01 May to 03 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 30 Apr 079 Predicted 01 May-03 May 079/079/079 90 Day Mean 30 Apr 081
V. Geomagnetic A Indices
Observed Afr/Ap 29 Apr 004/006 Estimated Afr/Ap 30 Apr 005/005 Predicted Afr/Ap 01 May-03 May 005/005-005/005-007/008
VI. Geomagnetic Activity Probabilities 01 May to 03 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 10% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 15% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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