Viewing archive of Sunday, 28 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 28 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 179 Issued at 2200Z on 28 JUN 1998IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z SOLAR ACTIVITY WAS LOW. OCCASIONAL C-CLASS EVENTS
OCCURRED AS REGION 8253 (N18W01) REMAINED THE MOST DOMINANT OF THE 8
SPOT GROUPS VISIBLE. 8253 SHOWS A MODEST DEGREE OF MAGNETIC
COMPLEXITY AND BRIGHT PLAGE. ONE NEW REGION WAS ASSIGNED, 8261
(N32E16).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO PERSIST
AT THE LOW LEVEL.
IIA. Geophysical Activity Summary 27-2100Z to 28-2100Z
THE GEOMAGNETIC FIELD WAS QUIET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED THROUGHOUT THE PERIOD.
III. Event Probabilities 29 JUN to 01 JUL
| Class M | 30% | 30% | 30% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 28 JUN 122 Predicted 29 JUN-01 JUL 125/125/130 90 Day Mean 28 JUN 108
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 JUN 005/005 ESTIMATED AFR/AP 28 JUN 005/005 PREDICTED AFR/AP 29 JUN-01 JUL 005/008-005/010-005/012
VI. Geomagnetic Activity Probabilities 29 JUN to 01 JUL
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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