Viewing archive of Tuesday, 15 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 15 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 166 Issued at 2200Z on 15 JUN 1999IA. Analysis of Solar Active Regions and Activity from 14-2100Z to 15-2100Z SOLAR ACTIVITY WAS LOW. THE FIFTEEN SPOTTED REGIONS ON
THE SOLAR DISK HAVE BEEN RELATIVELY STABLE DURING THE PERIOD. REGION
8583 (S12E17) PRODUCED A C1/SF EVENT AT 15/0031Z. THREE NEW REGIONS
WERE NUMBERED TODAY AS REGION 8586 (N34W18), REGION 8587 (N19E05),
AND REGION 8588 (S22E20).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
WITH AN ISOLATED CHANCE FOR AN M-CLASS EVENT.
IIA. Geophysical Activity Summary 14-2100Z to 15-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. A WEAK SHOCK WAS REFLECTED
IN THE ACE SOLAR WIND DATA BEGINNING AROUND 15/0700Z. THIS
DISTURBANCE MAY BE ASSOCIATED WITH A CORONAL MASS EJECTION LATE ON
12 JUNE.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 16 JUN to 18 JUN
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 15 JUN 159 Predicted 16 JUN-18 JUN 155/150/150 90 Day Mean 15 JUN 136
V. Geomagnetic A Indices
OBSERVED AFR/AP 14 JUN 002/004 ESTIMATED AFR/AP 15 JUN 005/005 PREDICTED AFR/AP 16 JUN-18 JUN 005/010-005/012-005/007
VI. Geomagnetic Activity Probabilities 16 JUN to 18 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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