Viewing archive of Thursday, 29 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 29 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 119 Issued at 2200Z on 29 Apr 2010IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z Solar activity was very low. Region 1063 (N16E01) is
spotless today. No flares were observed during the past 24 hours.
IB. Solar Activity Forecast
Solar activity is expected to be very
low.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
The geomagnetic field was predominantly quiet with an isolated active
period at mid-latitude reported at 29/0600Z. Observations from the
ACE spacecraft indicate the activity was due to a co-rotating
interaction region with observed IMF Bz fluctuations of +/- 7 nT and
an increase in Bt of 9 nT. Solar wind speeds have increased the
last 24 hours from around 310 to 400 km/s indicating the presence of
a weak coronal hole high speed stream.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominantly quiet for the next three days (30
April-02 May).
III. Event Probabilities 30 Apr to 02 May
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 29 Apr 076 Predicted 30 Apr-02 May 076/076/076 90 Day Mean 29 Apr 081
V. Geomagnetic A Indices
Observed Afr/Ap 28 Apr 002/004 Estimated Afr/Ap 29 Apr 005/005 Predicted Afr/Ap 30 Apr-02 May 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 30 Apr to 02 May
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 05% | 05% | 05% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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