Viewing archive of Sunday, 5 March 2000

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 2000 Mar 05 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 065 Issued at 2200Z on 05 MAR 2000

IA. Analysis of Solar Active Regions and Activity from 04-2100Z to 05-2100Z

SOLAR ACTIVITY HAS BEEN LOW FOR THE PAST 24 HOURS. REGION 8898 (S14E35) PRODUCED NEARLY ALL OF TODAY'S FLARES INCLUDING THE LARGEST: A C9/SF AT 1530Z. THE REGION HAS GROWN RAPIDLY OVER THE PAST 24 HOURS, PRODUCED A TOTAL OF 8 C-CLASS FLARES, AND IS NOW A 140 MILLIONTHS D-TYPE REGION. REGION 8891 (S16W42) CONTINUES TO BE THE LARGEST REGION ON THE DISK, BUT COULD ONLY MUSTER ONE C-CLASS EVENT: A C5/SF AT 0902Z. 8891 APPEARS TO BE UNCHANGED OVER THE PAST 24 HOURS. REGION 8900 (S16E02) HAS ALSO SHOWN GROWTH, BUT WAS MUCH LESS FLARE PRODUCTIVE THAN 8898: THE REGION IS NOW A 230 MILLIONTHS D-TYPE SUNSPOT GROUP. AN 8 DEGREE FILAMENT NEAR N24W40 DISAPPEARED BETWEEN 04/2052-2130Z. THE EVENT WAS ACCOMPANIED BY SUBSEQUENT PARALLEL RIBBONS AND A WEAK LONG-DURATION EVENT IN THE GOES X-RAYS. HOWEVER, THERE WAS NO OBVIOUS SIGNATURE IN CORONAGRAPH DATA OF AN ASSOCIATED CME. IN ADDITION A 15 DEGREE FILAMENT NEAR S10W08 DISAPPEARED BETWEEN 0615-0725Z. IN THIS CASE THERE WERE NO OTHER OBVIOUS ERUPTIVE SIGNATURES, SUGGESTING THAT THE FILAMENT FADED RATHER THAN ERUPTED. NEW REGION 8901 (S13E71) EMERGED ON THE DISK TODAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. THE MOST LIKELY SOURCES FOR M-CLASS LEVEL ACTIVITY ARE REGIONS 8898 (ESPECIALLY IF THE CURRENT GROWTH CONTINUES) AND 8891 (GIVEN THE STRENGTH OF THE MAGNETIC FIELDS AND THE POSSIBILITY OF SHEAR DEVELOPMENT ALONG AN E-W PORTION OF THE POLARITY INVERSION LINE). ALTHOUGH REGION 8882 (S16W90+) IS BEYOND WEST LIMB, IT COULD ALSO CONTRIBUTE TO X-RAY LEVELS FOR ANOTHER 24 HOURS.
IIA. Geophysical Activity Summary 04-2100Z to 05-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED FOR THE PAST 24 HOURS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED FOR THE NEXT THREE DAYS.
III. Event Probabilities 06 MAR to 08 MAR
Class M55%50%50%
Class X15%10%10%
Proton10%05%05%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       05 MAR 220
  Predicted   06 MAR-08 MAR  225/225/225
  90 Day Mean        05 MAR 171
V. Geomagnetic A Indices
OBSERVED AFR/AP 04 MAR  005/005
ESTIMATED AFR/AP 05 MAR  007/005
PREDICTED AFR/AP 06 MAR-08 MAR  010/012-007/010-007/008
VI. Geomagnetic Activity Probabilities 06 MAR to 08 MAR
A. Middle Latitudes
Active20%20%20%
Minor storm10%10%10%
Major-severe storm05%05%05%
B. High Latitudes
Active25%25%25%
Minor storm15%15%15%
Major-severe storm05%05%05%

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