Viewing archive of Monday, 1 March 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 Mar 01 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.comJoint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 060 Issued at 2200Z on 01 MAR 1999
IA. Analysis of Solar Active Regions and Activity from 28-2100Z to 01-2100Z
SOLAR ACTIVITY RETURNED TO LOW LEVELS. REGION 8471
(N28W26) PRODUCED SEVERAL LOW LEVEL C-CLASS SUBFLARES. ON 28 FEB,
PRIOR TO THE M6/2B, THIS REGION DEVELOPED A DELTA MAGNETIC
CLASSIFICATION OF MODERATE STRENGTH. IN THE INTERIM, THIS DELTA
FADED AND OVERALL THE REGION DECAYED SLIGHTLY IN PENUMBRAL COVERAGE.
THE MAIN NEUTRAL LINE IN THIS REGION WAS ALMOST LINEAR SUGGESTING
MAGNETIC SHEAR AT THAT LOCATION, BUT VECTOR MAGNETOGRAPH DATA WERE
NOT AVAILABLE TO CONFIRM THIS SUPPOSITION. REGION 8475 (N32E16)
EXHIBITED GROWTH AND PRODUCED SEVERAL SUBFLARES. A DELTA MAGNETIC
CONFIGURATION MAY BE FORMING IN THIS REGION. TWO SMALL AREAS OF
PLAGE AND SPOTS EMERGED NEAR S15W07. THERE WERE NUMBERED AS NEW
REGION 8478. THIS AREA MAY BE SPLIT INTO TWO SEPARATE REGIONS IN THE
NEAR FUTURE.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BECOME LOW TO
MODERATE. REGION 8471 REMAINS CAPABLE OF PRODUCING AN ISOLATED
M-CLASS EVENT BUT FLARE FREQUENCY SHOULD DECREASE AS DECAY
CONTINUES. REGION 8475 SHOULD BEGIN TO PRODUCE FREQUENT C-CLASS
EVENTS AND ISOLATED M-CLASS EVENTS SHOULD GROWTH AND INCREASING
MAGNETIC COMPLEXITY CONTINUE.
IIA. Geophysical Activity Summary 28-2100Z to 01-2100Z
THE GEOMAGNETIC FIELD RANGED FROM UNSETTLED TO MINOR STORM LEVELS.
THE MOST DISTURBED PERIODS WERE 01/0000-0600Z AND 01/1200-1800Z.
SOLAR WIND DATA SHOWED A LOW SPEED, HIGH DENSITY FLOW WITH NORTHWARD
BZ DURING THE DISTURBANCE. IT IS POSSIBLE THIS DISTURBANCE WAS
RELATED TO A FILAMENT DISRUPTION IN THE SOUTHEAST QUADRANT ON 24-25
FEB. AT THE END OF THE PERIOD, SOLAR WIND VELOCITY WAS INCREASING
AND DENSITY WAS DECREASING.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
PREDOMINANTLY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. ISOLATED
ACTIVE CONDITIONS ARE POSSIBLE DURING THAT TIME. A SMALL CORONAL
HOLE SHOULD BEGIN TO AFFECT THE EARTH'S FIELD ON 02-03 MAR.
III. Event Probabilities 02 MAR to 04 MAR
Class M | 50% | 40% | 40% |
Class X | 10% | 10% | 10% |
Proton | 05% | 05% | 05% |
PCAF | GREEN
|
IV. Penticton 10.7 cm Flux
Observed 01 MAR 120
Predicted 02 MAR-04 MAR 120/120/118
90 Day Mean 01 MAR 144
V. Geomagnetic A Indices
OBSERVED AFR/AP 28 FEB 010/014
ESTIMATED AFR/AP 01 MAR 024/025
PREDICTED AFR/AP 02 MAR-04 MAR 015/015-012/012-012/010
VI. Geomagnetic Activity Probabilities 02 MAR to 04 MAR
A. Middle Latitudes |
Active | 20% | 20% | 20% |
Minor storm | 10% | 10% | 10% |
Major-severe storm | 05% | 05% | 05% |
B. High Latitudes |
Active | 25% | 20% | 20% |
Minor storm | 10% | 10% | 10% |
Major-severe storm | 05% | 05% | 05% |
All times in UTC
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