Viewing archive of Wednesday, 3 September 1997
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 1997 Sep 03 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 246 Issued at 2200Z on 03 SEP 1997IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z SOLAR ACTIVITY WAS LOW. REGION 8076 (N28W54) PRODUCED
FIVE C-CLASS EVENTS. THE LARGEST WAS A C4/SF AT 02/2113Z. REGION
8076 DECAYED SLIGHTLY DURING THE PERIOD. NEW REGION 8083 (S28E56)
EMERGED RAPIDLY AND PRODUCED SEVERAL SMALL SUBFLARES.
IB. Solar Activity Forecast
GENERALLY, SOLAR ACTIVITY SHOULD
CONTINUE AT A LOW LEVEL WITH OCCASIONAL C-CLASS FLARES FROM REGION
8076. CONTINUED RAPID GROWTH IN NEW REGION 8083 WILL RESULT IN
C-CLASS EVENTS FROM THAT AREA ALSO. AN ISOLATED M-CLASS EVENT FROM
REGION 8076 REMAINS A POSSIBILITY.
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. SOME ISOLATED HIGH
LATITUDE SITES EXPERIENCED BRIEF ACTIVE PERIODS. SOLAR WIND DATA
SHOWED MODERATELY RAPID INCREASES IN VELOCITY AND DENSITY NEAR
02/2238Z. THIS DISTURBANCE IS POSSIBLY RELATED TO THE CME AND
CORONAL MORETON WAVE OBSERVED LATE ON 29 AUG. AT PRESS TIME DENSITY
AND VELOCITY INCREASES (TO 25 P/CC AND 500 KM/S) WERE OBSERVED.
GOES-9 (W135) EXPERIENCED A MAGNETOPAUSE CROSSING BETWEEN
03/2100-2110Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
AT UNSETTLED TO MINOR STORM LEVELS FOR 04 SEP AS THE CURRENT
DISTURBANCE CONTINUES. ISOLATED MAJOR STORMING IS POSSIBLE. MOSTLY
UNSETTLED LEVELS ARE EXPECTED ON 05 SEP WITH QUIET CONDITIONS
RETURNING ON 06 SEP.
III. Event Probabilities 04 SEP to 06 SEP
| Class M | 15% | 15% | 15% |
| Class X | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 03 SEP 093 Predicted 04 SEP-06 SEP 094/095/090 90 Day Mean 03 SEP 075
V. Geomagnetic A Indices
OBSERVED AFR/AP 02 SEP 005/005 ESTIMATED AFR/AP 03 SEP 014/017 PREDICTED AFR/AP 04 SEP-06 SEP 020/020-010/010-005/005
VI. Geomagnetic Activity Probabilities 04 SEP to 06 SEP
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 10% |
| Minor storm | 25% | 10% | 05% |
| Major-severe storm | 10% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 20% | 10% |
| Minor storm | 30% | 10% | 05% |
| Major-severe storm | 10% | 01% | 01% |
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