Viewing archive of Friday, 2 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 02 2201 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 092 Issued at 2200Z on 02 Apr 2010IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z Solar activity was very low. Region 1057 (N16W59) and
Region 1059 (S23W03) both remain stable and quiet. 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 01-2100Z to 02-2100Z
The geomagnetic field was quiet to active. The ACE spacecraft
indicated a shock around 02/0635Z. Solar wind speed increased from
around 435 km/s to 540 km/s, density increased, and the IMF
sustained several hours of southward Bz. The Boulder magnetometer
observed a 19 nT sudden impulse at 02/0721Z. The exact source for
the activity is not known, however, it may have resulted from the
CME observed on 30 March.
IIB. Geophysical Activity Forecast
The geomagnetic field is
expected to be predominantly quiet with isolated periods of
unsettled conditions for the next three days (03-05 April).
III. Event Probabilities 03 Apr to 05 Apr
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | green | ||
IV. Penticton 10.7 cm Flux
Observed 02 Apr 076 Predicted 03 Apr-05 Apr 075/075/080 90 Day Mean 02 Apr 083
V. Geomagnetic A Indices
Observed Afr/Ap 01 Apr 009/012 Estimated Afr/Ap 02 Apr 012/012 Predicted Afr/Ap 03 Apr-05 Apr 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 03 Apr to 05 Apr
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 01% | 01% | 01% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 01% | 01% | 01% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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