Viewing archive of Thursday, 11 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 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 162 Issued at 2200Z on 11 JUN 1998IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z SOLAR ACTIVITY WAS LOW TO MODERATE. A LONG DURATION C1
X-RAY EVENT OCCURRED AT 11/0014UT AND A LONG DURATION M1 X-RAY EVENT
OCCURRED AT 11/1027UT. BOTH ARE BELIEVED TO HAVE ORIGINATED FROM THE
NE LIMB IN CONJUNCTION WITH X-RAY LOOPS VISIBLE IN THE LASCO/EIT
IMAGES.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE WITH A POSSIBLE INCREASE IN ACTIVITY ON 12 JUN WHEN OLD
REGION 8226 (N18 L-210) IS DUE TO RETURN. THAT REGION COULD POSSIBLY
BE THE SOURCE OF THE X-RAY LOOPS ON THE NE LIMB.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
GEOMAGNETIC FIELD WAS QUIET TO ACTIVE, WITH ONLY ONE ACTIVE PERIOD
(K=4) OCCURRING 10/2100-2400UT.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 12 JUN to 14 JUN
| Class M | 40% | 40% | 40% |
| Class X | 10% | 10% | 10% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 11 JUN 112 Predicted 12 JUN-14 JUN 115/120/122 90 Day Mean 11 JUN 110
V. Geomagnetic A Indices
OBSERVED AFR/AP 10 JUN 016/015 ESTIMATED AFR/AP 11 JUN 007/008 PREDICTED AFR/AP 12 JUN-14 JUN 010/010-010/008-010/012
VI. Geomagnetic Activity Probabilities 12 JUN to 14 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 20% | 20% |
| Minor storm | 10% | 10% | 10% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 15% | 15% | 15% |
| Major-severe storm | 01% | 01% | 01% |
All times in UTC
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