Viewing archive of Saturday, 29 January 2000
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 2000 Jan 29 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 029 Issued at 2200Z on 29 JAN 2000IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 29-2100Z SOLAR ACTIVITY WAS VERY LOW DURING THE LAST 24 HOURS.
REGION 8841 (S30W35) IS CURRENTLY THE LARGEST GROUP ON THE DISK BUT
WAS STABLE AND QUIET. REGION 8845 (S16W34) EXHIBITED A SLOW GROWTH
TREND. SURGING WAS SEEN ON THE WEST LIMB WITH THE DEPARTURE OF
REGION 8844 (N06W83).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
FOR THE NEXT THREE DAYS.
IIA. Geophysical Activity Summary 28-2100Z to 29-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY ACTIVE DURING THE PAST 24 HOURS.
THERE WAS A PERIOD OF MINOR STORM LEVELS AT HIGH LATITUDES FROM
1200-1500Z. SOLAR WIND OBSERVATIONS CONTINUE TO SHOW A PERSISTING
HIGH-SPEED CORONAL HOLE STREAM. THE GREATER THAN 2 MEV ELECTRON
FLUXES ATTAINED HIGH LEVELS DURING THE PAST 24 HOURS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE ACTIVE FOR THE NEXT 24 HOURS. A SLOW DECLINE TO
UNSETTLED TO ACTIVE LEVELS IS ANTICIPATED FOR THE SECOND AND THIRD
DAYS AS THE INFLUENCE OF THE CORONAL HOLE BEGINS TO SLOWLY WANE.
III. Event Probabilities 30 JAN to 01 FEB
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 29 JAN 128 Predicted 30 JAN-01 FEB 130/130/130 90 Day Mean 29 JAN 174
V. Geomagnetic A Indices
OBSERVED AFR/AP 28 JAN 022/029 ESTIMATED AFR/AP 29 JAN 025/025 PREDICTED AFR/AP 30 JAN-01 FEB 020/025-015/020-015/015
VI. Geomagnetic Activity Probabilities 30 JAN to 01 FEB
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 35% | 35% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 10% | 05% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 45% | 50% | 50% |
| Minor storm | 15% | 10% | 10% |
| Major-severe storm | 10% | 05% | 05% |
All times in UTC
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