Viewing archive of Saturday, 14 August 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 Aug 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 226 Issued at 2200Z on 14 AUG 1999IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z SOLAR ACTIVITY WAS LOW. REGION 8668 (N22E67) PRODUCED
THE LARGEST FLARE OF THE PAST DAY, A C7/1F AT 14/1210UT. REGION 8662
(S16W46) ALSO PRODUCED C-CLASS ACTIVITY. NEITHER SUNSPOT REGION IS
SIGNIFICANTLY COMPLEX. NEW REGION 8669 (S21E39) EMERGED ON THE DISK.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. C-CLASS ACTIVITY SHOULD CONTINUE, PRINCIPALLY IN
REGIONS 8662 AND 8668. A LOW-LEVEL M-CLASS FLARE IS POSSIBLE IN
THESE REGIONS AS WELL.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 15 AUG to 17 AUG
| Class M | 10% | 10% | 10% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 14 AUG 128 Predicted 15 AUG-17 AUG 130/132/134 90 Day Mean 14 AUG 163
V. Geomagnetic A Indices
OBSERVED AFR/AP 13 AUG 009/011 ESTIMATED AFR/AP 14 AUG 007/006 PREDICTED AFR/AP 15 AUG-17 AUG 008/007-008/007-008/007
VI. Geomagnetic Activity Probabilities 15 AUG to 17 AUG
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 01% | 01% | 01% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 15% | 15% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 05% | 05% | 05% |
All times in UTC
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