Viewing archive of Monday, 19 June 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 Jun 19 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 171 Issued at 2200Z on 19 JUN 2000IA. Analysis of Solar Active Regions and Activity from 18-2100Z to 19-2100Z SOLAR ACTIVITY HAS BEEN LOW DURING THE PAST 24 HOURS.
TODAY'S ACTIVITY CONSISTED OF A FEW, LOW-LEVEL C-CLASS FLARES.
REGION 9042 (N23W11) WAS ONE OF THE MORE ACTIVE REGIONS ON THE SUN,
PRODUCING OCCASIONAL SUBFLARE ACTIVITY. REGION 9046 (N21E19) IS THE
LARGEST REGION ON THE DISK (570 MILLIONTHS), BUT COULD ONLY MUSTER
ONE SUBFLARE. A FILAMENT OF ABOUT 30 DEGREES LENGTH ERUPTED FROM THE
NORTHEAST PART OF THE DISK LATE ON THE 18TH. A CME WAS SUBSEQUENTLY
OBSERVED TO ENTER THE LASCO/C2 FIELD OF VIEW CLOSE TO THE NORTH
SOLAR POLE AT 18/2140Z. THE TRANSIENT DOES NOT APPEAR TO BE
EARTHBOUND.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. REGIONS 9042 AND 9046 ARE THE MOST LIKELY SOURCES FOR
M-CLASS LEVEL ACTIVITY. THERE IS A SLIGHT CHANCE FOR A MAJOR FLARE
OR A PROTON PRODUCING FLARE.
IIA. Geophysical Activity Summary 18-2100Z to 19-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET TO UNSETTLED FOR THE PAST 24
HOURS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 20 JUN to 22 JUN
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 19 JUN 178 Predicted 20 JUN-22 JUN 180/180/180 90 Day Mean 19 JUN 187
V. Geomagnetic A Indices
OBSERVED AFR/AP 18 JUN 010/011 ESTIMATED AFR/AP 19 JUN 007/010 PREDICTED AFR/AP 20 JUN-22 JUN 010/010-010/010-010/010
VI. Geomagnetic Activity Probabilities 20 JUN to 22 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 05% | 05% | 05% |
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