Viewing archive of Wednesday, 16 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 16 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 167 Issued at 2200Z on 16 JUN 1999IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z SOLAR ACTIVITY WAS LOW. REGION 8585 (N37E28) PRODUCED A
C3/1F AT 16/0509Z. THIS EVENT ALSO CORRESPONDED WITH A CME SEEN ON
THE LASCO IMAGES. AN OPTICALLY UNCORRELATD TYPE II RADIO SWEEP
(SPEED 700 KM/S) OCCURRED AT 16/0328Z. A NEW REGION WAS NUMBERED
TODAY AS REGION 8589 (N28E04).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
WITH AN ISOLATED CHANCE FOR AN M-CLASS EVENT.
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED THROUGH THE PERIOD.
III. Event Probabilities 17 JUN to 19 JUN
| Class M | 20% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 16 JUN 153 Predicted 17 JUN-19 JUN 150/150/145 90 Day Mean 16 JUN 136
V. Geomagnetic A Indices
OBSERVED AFR/AP 15 JUN 004/008 ESTIMATED AFR/AP 16 JUN 005/008 PREDICTED AFR/AP 17 JUN-19 JUN 005/010-005/007-005/007
VI. Geomagnetic Activity Probabilities 17 JUN to 19 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% |
All times in UTC
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