Viewing archive of Wednesday, 11 March 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 Mar 11 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 070 Issued at 2200Z on 11 MAR 1998IA. Analysis of Solar Active Regions and Activity from 10-2100Z to 11-2100Z SOLAR ACTIVITY WAS VERY LOW. NEW FLUX EMERGENCE IS
OCCURRING IN THE VICINITY OF REGIONS 8178 (S16E59) AND 8179
(S23E50). THIS COMPLEX MAY PROVE TO CONSIST OF MORE THAN TWO GROUPS,
BUT THAT DETERMINATION AWAITS FURTHER ANALYSIS AFFECTED BY LESS
FORESHORTENING TOMORROW. LITTLE IN THE WAY OF FLARE ACTIVITY
OCCURRED, AND THE LIMBS WERE STABLE.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY
LOW TO LOW.
IIA. Geophysical Activity Summary 10-2100Z to 11-2100Z
THE GEOMAGNETIC FIELD PERSISTED AT ACTIVE TO MAJOR STORM CONDITIONS
FOR THE MAJORITY OF THE PERIOD. THIS ACTIVITY BEGAN YESTERDAY NEAR
0900Z AND IS NOW WANING. CONSTANT SOLAR WIND SPEEDS IN EXCESS OF 500
KM/S OCCURRED DURING THE ENTIRE INTERVAL. THE GREATER THAN 2 MEV
ELECTRON FLUX AT GEOSYNCHRONOUS ORBIT ATTAINED HIGH LEVELS AT 1458Z.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED EARLY, AS THE CURRENT DISTURBANCE GRADUALLY
WEAKENS. EPISODES OF SUBSTORM ACTIVITY ARE POSSIBLE DURING LOCAL
NIGHTTIMES IN THE NEXT 24 HOURS. QUIET CONDITIONS SHOULD DOMINATE
THE LAST 2 DAYS.
III. Event Probabilities 12 MAR to 14 MAR
| Class M | 01% | 01% | 01% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 11 MAR 101 Predicted 12 MAR-14 MAR 105/110/115 90 Day Mean 11 MAR 095
V. Geomagnetic A Indices
OBSERVED AFR/AP 10 MAR 026/025 ESTIMATED AFR/AP 11 MAR 025/028 PREDICTED AFR/AP 12 MAR-14 MAR 010/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 12 MAR to 14 MAR
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 20% | 10% |
| Minor storm | 05% | 05% | 05% |
| Major-severe storm | 01% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 20% |
| Minor storm | 15% | 10% | 05% |
| Major-severe storm | 01% | 01% | 01% |
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