Viewing archive of Wednesday, 9 April 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 Apr 09 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 099 Issued at 2200Z on 09 APR 1997IA. Analysis of Solar Active Regions and Activity from 08-2100Z to 09-2100Z SOLAR ACTIVITY WAS LOW BY VIRTUE OF A SINGLE C1 X-RAY
BURST IN REGION 8026 (S23W91) IN CONJUNCTION WITH A BRIGHT SURGE ON
THE LIMB. THIS REGION HAS ROTATED OFF THE WEST LIMB. REGION 8027
(S28W13) IS STILL DECAYING AND IS NOW A SIMPLE BXO SPOT GROUP. NEW
REGION 8029 (N24W19), A CRO SPOT GROUP,WAS NUMBERED TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS FORECAST TO BE VERY
LOW TO LOW. REGION 8027 STILL HAS A DIMINISHED CHANCE OF C-CLASS
ACTIVITY. REGION 8029 HAS POTENTIAL FOR C-CLASS ACTIVITY AS WELL.
IIA. Geophysical Activity Summary 08-2100Z to 09-2100Z
THE GEOMAGNETIC FIELD HAS BEEN QUIET AT ALL LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TO ACTIVE FOR THE FIRST DAY OF THE FORECAST
AND MOSTLY ACTIVE ON DAY TWO IN RESPONSE TO THE C6/3N FLARE AND CME
IN REGION 8027 ON 7 APRIL. HIGH LATITUDE STATIONS MAY EXPERIENCE
MINOR STORMING WITH ISOLATED PERIODS OF MAJOR STORMING OVER THE NEXT
TWO DAYS. ACTIVITY IS EXPECTED TO DIMINISH TO UNSETTLED LEVELS BY
DAY THREE.
III. Event Probabilities 10 APR to 12 APR
| Class M | 05% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 09 APR 078 Predicted 10 APR-12 APR 076/076/076 90 Day Mean 09 APR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 08 APR 005/004 ESTIMATED AFR/AP 09 APR 006/010 PREDICTED AFR/AP 10 APR-12 APR 015/030-020/025-010/012
VI. Geomagnetic Activity Probabilities 10 APR to 12 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 15% |
| Minor storm | 20% | 20% | 10% |
| Major-severe storm | 10% | 10% | 05% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 30% | 30% | 30% |
| Minor storm | 20% | 20% | 20% |
| Major-severe storm | 10% | 10% | 10% |
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