Viewing archive of Sunday, 14 June 1998
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 1998 Jun 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 165 Issued at 2200Z on 14 JUN 1998IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z SOLAR ACTIVITY DECLINED TO LOW LEVELS. REGION 8242
(S21E28) PRODUCED ISOLATED B- AND C-CLASS SUBFLARES. NO REMARKABLE
GROWTH OR DECAY OCCURRED IN ANY OF THE SPOTTED REGIONS. NEW REGION
8248 (N21E02) WAS NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
REGIONS 8242, 8243 (N18E51), AND 8247 (S23E17) MAY PRODUCE ISOLATED
C-CLASS FLARES. REGION 8242 MAY ALSO PRODUCE AN ISOLATED M-CLASS
FLARE.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
THE GEOMAGNETIC FIELD WAS AT QUIET TO UNSETTLED LEVELS THROUGH
14/0300UT. FIELD ACTIVITY INCREASED TO ACTIVE TO MINOR STORM LEVELS
DURING 14/0400 - 0600UT, THEN DECLINED TO QUIET TO UNSETTLED LEVELS
FOR THE REMAINDER OF THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED. ISOLATED ACTIVE PERIODS ARE
POSSIBLE ON DAY THREE.
III. Event Probabilities 15 JUN to 17 JUN
| Class M | 30% | 30% | 30% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 14 JUN 102 Predicted 15 JUN-17 JUN 098/096/094 90 Day Mean 14 JUN 110
V. Geomagnetic A Indices
OBSERVED AFR/AP 13 JUN 004/006 ESTIMATED AFR/AP 14 JUN 015/010 PREDICTED AFR/AP 15 JUN-17 JUN 005/010-005/010-010/012
VI. Geomagnetic Activity Probabilities 15 JUN to 17 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 30% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 35% |
| Minor storm | 05% | 05% | 20% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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