Viewing archive of Tuesday, 22 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 22 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 173 Issued at 2200Z on 22 JUN 1999IA. Analysis of Solar Active Regions and Activity from 21-2100Z to 22-2100Z SOLAR ACTIVITY WAS MODERATE. AN M1/1N FLARE OCCURRED
AT 22/1829Z, ORIGINATING FROM REGION 8592 (N24E30). ASSOCIATED WITH
THIS FLARE WERE TYPE II (1400KM/S) AND IV RADIO SWEEPS AS WELL AS
MULTI-FREQUENCY RADIO BURSTS INCLUDING A 760 SFU TENFLARE. THE
REMAINDER OF THE PERIOD WAS CHARACTERIZED BY NUMEROUS WEAK C-CLASS
EVENTS, THE MAJORITY OF WHICH ORIGINATED FROM REGION 8599 (S16E64).
NEW REGION 8600 (N19W22) WAS NUMBERED TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE AT
LOW TO MODERATE LEVELS FOR THE NEXT THREE DAYS.
IIA. Geophysical Activity Summary 21-2100Z to 22-2100Z
THE GEOMAGNETIC FIELD WAS AT QUIET LEVELS THE ENTIRE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 23 JUN to 25 JUN
| Class M | 60% | 60% | 60% |
| Class X | 05% | 05% | 05% |
| Proton | 10% | 10% | 10% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 22 JUN 162 Predicted 23 JUN-25 JUN 160/160/160 90 Day Mean 22 JUN 138
V. Geomagnetic A Indices
OBSERVED AFR/AP 21 JUN 001/004 ESTIMATED AFR/AP 22 JUN 003/005 PREDICTED AFR/AP 23 JUN-25 JUN 005/005-010/010-010/013
VI. Geomagnetic Activity Probabilities 23 JUN to 25 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 25% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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