Viewing archive of Monday, 7 June 1999
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 1999 Jun 07 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 158 Issued at 2200Z on 07 JUN 1999IA. Analysis of Solar Active Regions and Activity from 06-2100Z to 07-2100Z SOLAR ACTIVITY WAS LOW. REGIONS 8574 (N28E14) AND 8562
(S16W70) WERE ONCE AGAIN THE MAIN ACTIVITY CENTERS, ALTHOUGH NEITHER
COULD PRODUCE MORE THAN AN ISOLATED SMALL C-CLASS FLARE. THE VISIBLE
DISK IS LESS IMPRESSIVE THAN IT HAS BEEN THE PAST FEW DAYS, AS ONLY
TWELVE SPOT GROUPS ARE NOW VISIBLE. THE LIMBS WERE QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO PERSIST
AT LOW LEVELS. REGION 8574 MAY PRODUCE AN ISOLATED M-CLASS EVENT,
SHOULD FURTHER DEVELOPMENT OCCUR.
IIA. Geophysical Activity Summary 06-2100Z to 07-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO REMAIN AT QUIET LEVELS FOR THE NEXT THREE DAYS.
III. Event Probabilities 08 JUN to 10 JUN
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 07 JUN 158 Predicted 08 JUN-10 JUN 155/150/145 90 Day Mean 07 JUN 134
V. Geomagnetic A Indices
OBSERVED AFR/AP 06 JUN 003/004 ESTIMATED AFR/AP 07 JUN 005/005 PREDICTED AFR/AP 08 JUN-10 JUN 005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 08 JUN to 10 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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