Viewing archive of Sunday, 12 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 12 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 072 Issued at 2200Z on 12 MAR 2000IA. Analysis of Solar Active Regions and Activity from 11-2100Z to 12-2100Z SOLAR ACTIVITY WAS LOW. THE LARGEST EVENTS OF THE
PERIOD WERE A C6/SF FROM REGION 8904 (N23W59), AND A C6/1F FROM
REGION 8898 (S13W59). BOTH FLARES EXHIBITED MINOR MULTI-FREQUENCY
RADIO BURSTS. REGIONS 8904 AND 8906 (S15E18) PRODUCED SEVERAL
SMALLER C-CLASS EVENTS. REGION 8906 REMAINS THE LARGEST REGION ON
THE VISIBLE DISK AND NOW EXCEEDS 800 MILLIONTHS OF WHITE LIGHT AREA.
A MAGNETIC DELTA CONFIGURATION AND MODERATE TO STRONG GRADIENTS ARE
ALSO APPARENT. REMAINING REGIONS WERE STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE
MODERATE. REGION 8906 WILL CONTINUE PRODUCING C-CLASS X-RAY ACTIVITY
WITH A GOOD CHANCE FOR AN M-CLASS EVENT. MOSTLY C-CLASS ACTIVITY
WITH AN ISOLATED CHANCE FOR AN M-CLASS EVENT, EXPECTED FROM REGIONS
8898 AND 8904 AS THEY APPROACH THE WEST LIMB.
IIA. Geophysical Activity Summary 11-2100Z to 12-2100Z
THE GEOMAGNETIC FIELD BEGAN THE PERIOD AT QUIET LEVELS BUT WAS
UNSETTLED TO ACTIVE SINCE. ISOLATED MINOR STORMING PERIODS WERE ALSO
OBSERVED AT HIGH LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO CONTINUE AT QUIET TO ACTIVE LEVELS. ISOLATED MINOR
STORMING PERIODS ARE ALSO POSSIBLE AGAIN, MOSTLY AT HIGH LATITUDES.
III. Event Probabilities 13 MAR to 15 MAR
| Class M | 50% | 50% | 50% |
| Class X | 15% | 15% | 15% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 12 MAR 203 Predicted 13 MAR-15 MAR 200/195/190 90 Day Mean 12 MAR 175
V. Geomagnetic A Indices
OBSERVED AFR/AP 11 MAR 007/012 ESTIMATED AFR/AP 12 MAR 015/012 PREDICTED AFR/AP 13 MAR-15 MAR 012/010-010/010-005/010
VI. Geomagnetic Activity Probabilities 13 MAR to 15 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 50% | 40% | 20% |
| Minor storm | 20% | 15% | 10% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 60% | 50% | 30% |
| Minor storm | 30% | 20% | 10% |
| Major-severe storm | 10% | 05% | 01% |
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