Viewing archive of Sunday, 13 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 13 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 164 Issued at 2200Z on 13 JUN 1999IA. Analysis of Solar Active Regions and Activity from 12-2100Z to 13-2100Z SOLAR ACTIVITY WAS LOW. SEVERAL C-CLASS EVENTS OCCURRED
DURING THE PERIOD FROM FIVE OF THE ELEVEN SPOTTED REGIONS ON THE
SOLAR DISK. REGION 8569 (N19W45) IS THE LARGEST REGION CLASSIFIED AS
AN EKC WITH 380 MILLIONTHS OF WHITE LIGHT AREA.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. SEVERAL REGIONS ON THE SOLAR DISK ARE CAPABLE OF
PRODUCING C-CLASS EVENTS AND ISOLATED M-CLASS.
IIA. Geophysical Activity Summary 12-2100Z to 13-2100Z
THE GEOMAGNETIC FIELD WAS PREDOMINATELY QUIET THROUGH THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED THROUGH THE FORECAST PERIOD.
III. Event Probabilities 14 JUN to 16 JUN
| Class M | 40% | 40% | 40% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 13 JUN 168 Predicted 14 JUN-16 JUN 165/165/160 90 Day Mean 13 JUN 136
V. Geomagnetic A Indices
OBSERVED AFR/AP 12 JUN 005/007 ESTIMATED AFR/AP 13 JUN 005/010 PREDICTED AFR/AP 14 JUN-16 JUN 005/008-005/010-005/008
VI. Geomagnetic Activity Probabilities 14 JUN to 16 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 25% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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