Viewing archive of söndag, 29 augusti 1999
Solaktivitetsrapport
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.
Rapport för sol- och geofysisk aktivitet 1999 Aug 29 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 241 publicerat klockan 2200Z på 29 AUG 1999IA. Analys av solfläcksgrupper och solaktivitet från 28-2100Z till 29-2100Z SOLAR ACTIVITY BECAME LOW. THE LARGEST EVENT OF THE
PERIOD WAS A C9/1N FROM REGION 8681 (N22W03) AT 29/1731Z. THIS
REGION CONTINUED TO EMERGE RAPIDLY AND EXHIBITED AN ABNORMAL
MAGNETIC CONFIGURATION OF A NEGATIVE ISLAND SURROUNDED BY POSITIVE
POLARITY. REGION 8674 (S23W40) STABILIZED. THE LARGEST EVENT IT
PRODUCED WAS A C4/SF AT 29/1229Z. THIS REGION MAINTAINED THE
MAGNETIC COMPLEXITY IT HAS EXHIBITED DURING THE LAST SEVERAL DAYS
BUT IT SHOWED NO REGION DYNAMICS SUCH AS GROWTH AND SPOT PROPER
MOTION. THE X1 FLARE AT 28/1805Z PRODUCED A LARGE CORONAL MASS
EJECTION THAT MOVED SOUTHWARD OUT OF THE ECLIPTIC.
IB. Prognos för solaktivitet
SOLAR ACTIVITY SHOULD BE PREDOMINANTLY
MODERATE. REGION 8674 RETAINS THE CAPABILITY OF PRODUCING M-CLASS
AND POSSIBLY ADDITIONAL X-CLASS EVENTS. HOWEVER, THE FREQUENCY OF
EVENTS SHOULD LESSEN AS THIS REGION BEGINS A SLOW PERIOD OF DECAY.
REGION 8681 SHOULD PRODUCE FREQUENT C-CLASS EVENTS AND NOW POSSESSES
THE POTENTIAL FOR SMALL M-CLASS FLARES.
IIA. Sammanfattning av geofysisk aktivitet 28-2100Z till 29-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED. SOLAR WIND VELOCITY
DECLINED DURING THE PERIOD TO JUST OVER 500 KM/S. ENERGETIC ELECTRON
FLUXES AT GEOSYNCHRONOUS WERE HIGH.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD SHOULD BE
GENERALLY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. NONE OF MANY
RECENT CORONAL MASS EJECTIONS ARE EXPECTED TO IMPACT THE EARTH
HEAD-ON BUT IT IS POSSIBLE THE FLANKS OF SOME OF THE CMES COULD
REACH THE EARTH. THEREFORE, ISOLATED ACTIVE, TO POSSIBLY MINOR
STORM, PERIODS ARE POSSIBLE FOR THE ENTIRE PERIOD. ENERGETIC
ELECTRON FLUXES SHOULD REMAIN AT HIGH LEVELS FOR 1-2 MORE DAYS. THE
POSSIBLY EXISTS FOR A SOLAR PROTON EVENT DURING THE PERIOD. REGION
8674 IS THE PROBABLE SOURCE.
III. Chans för solutbrott från 30 AUG till 01 SEP
| M-klass | 75% | 75% | 75% |
| X-klass | 40% | 40% | 40% |
| Proton | 30% | 30% | 30% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 29 AUG 218 Prognoserat 30 AUG-01 SEP 220/217/197 90 Day Mean 29 AUG 168
V. Geomagnetiskt A-index
OBSERVED AFR/AP 28 AUG 011/014 ESTIMATED AFR/AP 29 AUG 008/010 PREDICTED AFR/AP 30 AUG-01 SEP 010/012-012/015-012/012
VI. Chanser för geomagnetisk aktivitet från 30 AUG till 01 SEP
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 30% | 30% |
| Små stormförhållanden | 05% | 15% | 15% |
| Svåra stormförhållanden | 05% | 05% | 05% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 30% | 30% |
| Små stormförhållanden | 05% | 15% | 15% |
| Svåra stormförhållanden | 05% | 05% | 05% |
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