Viewing archive of Thursday, 10 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 10 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 161 Issued at 2200Z on 10 JUN 1999IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z SOLAR ACTIVITY WAS LOW. THE TWO MOST ACTIVE REGIONS
WERE 8569 (N19W07) AND 8578 (N19W23). BOTH REGIONS SHOWED GROWTH IN
AREA AND SPOT COUNT. BOTH REGIONS ALSO PRODUCED SEVERAL OPTICAL
SUBFLARES.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
LOW.
IIA. Geophysical Activity Summary 09-2100Z to 10-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 11 JUN to 13 JUN
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 10 JUN 161 Predicted 11 JUN-13 JUN 165/160/160 90 Day Mean 10 JUN 135
V. Geomagnetic A Indices
OBSERVED AFR/AP 09 JUN 011/013 ESTIMATED AFR/AP 10 JUN 010/010 PREDICTED AFR/AP 11 JUN-13 JUN 010/010-010/012-005/008
VI. Geomagnetic Activity Probabilities 11 JUN to 13 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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