Viewing archive of Tuesday, 21 March 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 Mar 21 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 081 Issued at 2200Z on 21 MAR 2000IA. Analysis of Solar Active Regions and Activity from 20-2100Z to 21-2100Z
SOLAR ACTIVITY WAS MODERATE. AN UNOBSERVED M1 X-RAY
EVENT OCCURRED AT 1424Z, WITH ASSOCIATED TYPE II SWEEP. FLARE
ACTIVITY WAS SOMEWHAT SUPPRESSED, AS MOST OF THE DISK REGIONS WERE
EITHER STABLE OR DECAYING. REGION 8910 (N12W49) IS STILL DOMINANT IN
WHITE LIGHT AND H-ALPHA. NEWLY NUMBERED REGION 8922 (N14E57) ROTATED
FULLY INTO VIEW.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. REGION 8910 IS THE BEST CANDIDATE FOR ISOLATED M-CLASS
FLARES.
IIA. Geophysical Activity Summary 20-2100Z to 21-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED THROUGHOUT THE PERIOD, THERE IS A
CHANCE FOR SOMEWHAT ELEVATED ACTIVITY VERY LATE IN THE INTERVAL,
WHEN A CORONAL HOLE ROTATES TO A POTENTIALLY GEO-EFFECTIVE POSITION.
III. Event Probabilities 22 MAR to 24 MAR
| Class M | 50% | 50% | 50% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 21 MAR 231 Predicted 22 MAR-24 MAR 235/240/245 90 Day Mean 21 MAR 175
V. Geomagnetic A Indices
OBSERVED AFR/AP 20 MAR 005/008 ESTIMATED AFR/AP 21 MAR 003/005 PREDICTED AFR/AP 22 MAR-24 MAR 010/015-010/010-015/015
VI. Geomagnetic Activity Probabilities 22 MAR to 24 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 20% |
| Minor storm | 01% | 01% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 30% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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