Viewing archive of Thursday, 27 July 2006
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 2006 Jul 27 2203 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 208 Issued at 2200Z on 27 Jul 2006IA. Analysis of Solar Active Regions and Activity from 26-2100Z to 27-2100Z Solar activity continues at very low levels. Region 901
(N05E00), the only sunspot group on the visible disk, produced
occasional low B-class flares. Considerable decay was observed in
the trailing sunspots in this region; however, new negative flux
emerged northwest of the leader spot. This location was the source
of most of the B-class flares.
IB. Solar Activity Forecast
Solar activity is expected to continue
at very low levels.
IIA. Geophysical Activity Summary 26-2100Z to 27-2100Z
The geomagnetic field was quiet. Solar wind speed increased gradually
from 330 km/s to near 450 km/s by the end of the period. This
increase is associated with a weak high speed coronal hole stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be quiet with isolated unsettled periods.
III. Event Probabilities 28 Jul to 30 Jul
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 27 Jul 074 Predicted 28 Jul-30 Jul 075/075/075 90 Day Mean 27 Jul 078
V. Geomagnetic A Indices
Observed Afr/Ap 26 Jul 005/006 Estimated Afr/Ap 27 Jul 005/005 Predicted Afr/Ap 28 Jul-30 Jul 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 28 Jul to 30 Jul
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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