Viewing archive of Monday, 26 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 26 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 116 Issued at 2200Z on 26 Apr 2010IA. Analysis of Solar Active Regions and Activity from 25-2100Z to 26-2100Z Solar activity was very low. No flares were observed
during the past 24 hours and the disk remained spotless.
IB. Solar Activity Forecast
Solar activity is expected to remain
very low for the next three days (27-29 April).
IIA. Geophysical Activity Summary 25-2100Z to 26-2100Z
The geomagnetic field was quiet during the past 24 hours.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet to unsettled with isolated active periods at
high latitudes on day 1 (27 April) due to possible effects of a CME
observed on 22 April and a coronal hole high speed stream rotating
into a geoeffective position. Quiet to unsettled conditions are
expected on day two (28 April) due to a second coronal hole high
speed stream rotating into a geoeffective position. Conditions are
expected to be quiet on day three (29 April).
III. Event Probabilities 27 Apr to 29 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 26 Apr 076 Predicted 27 Apr-29 Apr 076/076/078 90 Day Mean 26 Apr 081
V. Geomagnetic A Indices
Observed Afr/Ap 25 Apr 002/003 Estimated Afr/Ap 26 Apr 004/004 Predicted Afr/Ap 27 Apr-29 Apr 008/010-007/008-005/005
VI. Geomagnetic Activity Probabilities 27 Apr to 29 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 05% |
| Minor storm | 05% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 15% | 05% |
| Minor storm | 10% | 05% | 01% |
| Major-severe storm | 01% | 01% | 01% |
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