Viewing archive of Wednesday, 1 July 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 Jul 01 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 182 Issued at 2200Z on 01 JUL 1998IA. Analysis of Solar Active Regions and Activity from 30-2100Z to 01-2100Z SOLAR ACTIVITY WAS LOW. REGION 8253 (N18W43) PRODUCED
TWO C-CLASS FLARES: A C1/SF AT 30/2301Z, AND A C6/SF AT 01/1840Z
WITH A TYPE II SWEEP AND MODERATE DECAMETRIC BURSTS INCLUDING 110
SFU AT 2695 MHZ. AN OPTICALLY UNCORRELATED TYPE II ALSO OCCURRED
WITH A C1 FLARE AT 01/1020Z. REGION 8259 (N27E25) PRODUCED A C1/SF
AT 01/0009Z. THIS REGION EXHIBITED SOME GROWTH AND DEVELOPED
MODERATE MAGNETIC COMPLEXITY. REGION 8256 (S23W08) PRODUCED A C3/1F
AT 01/1814Z WITH A DISAPPEARING FILAMENT. THE REMAINING FIVE REGIONS
WERE MOSTLY STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
LOW. SEVERAL OF THE EXISTING REGIONS ARE CAPABLE OF C-CLASS ACTIVITY
WITH A SLIGHT CHANCE OF AN M-CLASS FLARE.
IIA. Geophysical Activity Summary 30-2100Z to 01-2100Z
THE GEOMAGNETIC FIELD WAS QUIET,
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 02 JUL to 04 JUL
| Class M | 25% | 25% | 25% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 01 JUL 127 Predicted 02 JUL-04 JUL 126/126/126 90 Day Mean 01 JUL 108
V. Geomagnetic A Indices
OBSERVED AFR/AP 30 JUN 003/005 ESTIMATED AFR/AP 01 JUL 004/006 PREDICTED AFR/AP 02 JUL-04 JUL 010/012-010/012-012/014
VI. Geomagnetic Activity Probabilities 02 JUL to 04 JUL
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 25% | 25% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 25% | 30% | 30% |
| Minor storm | 05% | 10% | 10% |
| Major-severe storm | 01% | 02% | 02% |
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