Viewing archive of Wednesday, 2 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 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 092 Issued at 2200Z on 02 APR 1997 :::::::::::::::::::::::::::::::::::::::::::::::: CORRECTED COPY ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z
SOLAR ACTIVITY WAS LOW. REGION 8026 (S24W02) PRODUCED
TWO C-CLASS FLARES AND NUMEROUS B-CLASS EVENTS DURING THE REPORTING
PERIOD. AS MANY AS 14 NEW SPOTS HAVE FORMED SINCE YESTERDAY, WITH
THE REGION NOW DISPLAYING TWO DISTINCT PLAGE FIELDS (NORTHEAST AND
SOUTHWEST) IN A 29 SPOT 'EAI' BETA-GAMMA CONFIGURATION. THE
NORTHEAST PLAGE FIELD CONTAINS AN ACTIVE ARCH FILAMENT SYSTEM AND
DARK SURGE ON THE DISK. NEW REGION 8027 (S30E77), THE RETURN OF OLD
REGION 8021, A 3 SPOT 'CAO' BETA GROUP, WAS NUMBERED TODAY AS IT
ROTATED AROUND THE EAST LIMB.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO REMAIN
VERY LOW TO LOW, WITH A CONTINUED CHANCE FOR ISOLATED M-CLASS EVENTS
FROM REGION 8026 FOR THE NEXT THREE DAYS.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
THE GEOMAGNETIC FIELD HAS BEEN MOSTLY QUIET FOR THE PAST 24 HOURS,
EXCEPT FOR AN ISOLATED PERIOD OF UNSETTLED CONDITIONS DURING THE
INTERVAL 02/0000-0600Z. THE GREATER THAN 2 MEV ELECTRONS WERE IN THE
MODERATE TO HIGH RANGE.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT 24 HOURS. ACTIVITY IS
THEN EXPECTED TO INCREASE TO MOSTLY ACTIVE, WITH THE PROBABILITY OF
ISOLATED PERIODS OF MINOR STORMING, ON DAYS TWO AND THREE IN
RESPONSE TO AN EARTH-DIRECTED CME DETECTED BY SOHO/EIT IN
ASSOCIATION WITH THE M1/1B FLARE FROM REGION 8026 AT 01/1400Z.
III. Event Probabilities 03 APR to 05 APR
| Class M | 25% | 20% | 15% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 02 APR 081 Predicted 03 APR-05 APR 081/082/083 90 Day Mean 02 APR 074
V. Geomagnetic A Indices
OBSERVED AFR/AP 01 APR 011/008 ESTIMATED AFR/AP 02 APR 010/007 PREDICTED AFR/AP 03 APR-05 APR 010/010-025/020-025/015
VI. Geomagnetic Activity Probabilities 03 APR to 05 APR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 20% | 50% | 50% |
| Minor storm | 10% | 25% | 25% |
| Major-severe storm | 01% | 10% | 10% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 20% | 60% | 60% |
| Minor storm | 10% | 25% | 25% |
| Major-severe storm | 01% | 10% | 10% |
All times in UTC
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