Viewing archive of Tuesday, 2 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 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 153 Issued at 2200Z on 02 JUN 1998IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z SOLAR ACTIVITY REMAINED VERY LOW. ONLY SMALL B-CLASS
ENHANCEMENTS WERE OBSERVED. REGION 8230 (S19E24) GREW AT A MODERATE
PACE. NEW REGION 8232 (S19E74) ROTATED ONTO THE DISK. A MODERATE
SIZE CLASS H SPOT WAS VISIBLE HERE AND TRAILER SPOTS MAY FOLLOW.
THIS REGION IS THE RETURN OF OLD REGION 8213 THAT PRODUCED SEVERAL
C-CLASS FLARES AND ONE M-CLASS FLARE LAST ROTATION. A LARGE
PROMINENCE NEAR SW50 ERUPTED SHORTLY BEFORE 02/1500Z AND CREATED A
LARGE AND DENSE CORONAL MASS EJECTION THAT APPEARED TO PROPAGATE
SLIGHTLY OUT OF THE ECLIPTIC PLANE.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BECOME LOW.
REGION 8230 SHOULD BEGIN TO PRODUCE ISOLATED C-CLASS EVENTS DURING
THIS GROWTH PHASE. NEW REGION 8232 IS EXPECTED TO GENERATE
OCCASIONAL C-CLASS EVENTS AND POSSIBLY AN ISOLATED M-CLASS FLARE.
LIMB PROXIMITY OF THIS REGION HINDERS ACCURATE ANALYSIS.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. ENERGETIC ELECTRON
FLUXES AT GEOSYNCHRONOUS ORBIT BEGAN THE PERIOD AT HIGH LEVELS BUT
DECREASED QUICKLY TO MODERATE LEVELS FOR THE REMAINDER OF THE
PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 03 JUN to 05 JUN
| Class M | 20% | 20% | 20% |
| Class X | 05% | 05% | 05% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 02 JUN 105 Predicted 03 JUN-05 JUN 108/112/114 90 Day Mean 02 JUN 108
V. Geomagnetic A Indices
OBSERVED AFR/AP 01 JUN 004/006 ESTIMATED AFR/AP 02 JUN 007/008 PREDICTED AFR/AP 03 JUN-05 JUN 007/008-007/008-010/010
VI. Geomagnetic Activity Probabilities 03 JUN to 05 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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