Viewing archive of Sunday, 3 October 1999
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 1999 Oct 03 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 276 Issued at 2200Z on 03 OCT 1999IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z SOLAR ACTIVITY CONTINUED AT A LOW LEVEL. REGION 8716
(N20E60) PRODUCED A LONG DURATION C3/SF AT 03/1545Z. SEVERAL REGIONS
RECENTLY ROTATED OVER THE NORTHEAST AND SOUTHEAST LIMBS. THE MOST
COMPLEX AREA APPEARS TO BE IN THE NORTHEAST WHERE REGIONS 8716 AND
NEW 8720 (N14E65) ARE LOCATED IN CLOSE PROXIMITY. IN THE SOUTHEAST,
NEW REGIONS 8719 (S20E50) AND 8721 (S17E56) ALSO APPEARED TO BE
ALMOST ABUTTED. HOWEVER, NO CURRENT DISK REGIONS SHOWED MUCH IN THE
WAY OF DYNAMICS AND NO ONE REGION SHOWED SIGNIFICANT MAGNETIC
COMPLEXITY.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD REMAIN
PREDOMINANTLY LOW FOR THE NEXT THREE DAYS. AN ISOLATED M-CLASS EVENT
IS MILDLY POSSIBLE FROM THE REGION 8716/8720 COMPLEX.
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. SOLAR WIND VELOCITY
DROPPED INTO THE 400 KM/S RANGE. ENERGETIC ELECTRON FLUXES REACHED
HIGH LEVELS DURING THE PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
GENERALLY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. ISOLATED
ACTIVE PERIODS ARE POSSIBLE AT HIGH LATITUDES.
III. Event Probabilities 04 OCT to 06 OCT
| Class M | 15% | 15% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 03 OCT 135 Predicted 04 OCT-06 OCT 138/140/142 90 Day Mean 03 OCT 155
V. Geomagnetic A Indices
OBSERVED AFR/AP 02 OCT 009/015 ESTIMATED AFR/AP 03 OCT 007/015 PREDICTED AFR/AP 04 OCT-06 OCT 008/015-008/012-012/012
VI. Geomagnetic Activity Probabilities 04 OCT to 06 OCT
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 10% | 10% | 20% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 15% | 10% | 20% |
| Minor storm | 05% | 05% | 10% |
| Major-severe storm | 01% | 01% | 05% |
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