Viewing archive of onsdag, 30 december 1998
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 1998 Dec 30 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 364 publicerat klockan 2200Z på 30 DEC 1998IA. Analys av solfläcksgrupper och solaktivitet från 29-2100Z till 30-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8421 (N26W14)
PRODUCED ALL OF TODAY'S FLARES, INCLUDING THE ONLY M-CLASS EVENT: AN
M1/SF AT 0546Z. THE GROUP SHOWED SLOW GROWTH TODAY, PRIMARILY BY
MEANS OF CONSOLIDATION OF THE LEADER PART OF THE GROUP INTO A
SINGLE, LARGE PENUMBRAL REGION. THE REGION PRODUCED FREQUENT
SUBFLARES THROUGHOUT THE DAY, 7 OF WHICH WERE LOW-LEVEL C-CLASS
EVENTS. IT WOULD APPEAR THAT THE STORAGE OF NON-POTENTIAL MAGNETIC
ENERGY IN THE REGION IS PROMPTLY DISSIPATED BY THESE FREQUENT SMALL
EVENTS. REGION 8419 (N26W65) DECREASED SLOWLY TODAY AND WAS VERY
STABLE. NEW REGION 8425 (S26E50) WAS ASSIGNED TODAY AND IS A SIMPLE,
SMALL, BIPOLAR SUNSPOT GROUP.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE
MODERATE. REGION 8421 IS EXPECTED TO BE THE SOURCE FOR ANY M-CLASS
ACTIVITY OVER THE NEXT THREE DAYS. THERE CONTINUES TO BE A CHANCE
FOR AN ISOLATED MAJOR FLARE EVENT FROM THIS REGION.
IIA. Sammanfattning av geofysisk aktivitet 29-2100Z till 30-2100Z
THE GEOMAGNETIC FIELD WAS MOSTLY QUIET TO UNSETTLED. THE FIRST THREE
HOURS OF THE REPORTING PERIOD BEGAN WITH MOSTLY UNSETTLED CONDITIONS
WITH A FEW HIGH LATITUDE STATIONS REPORTING ACTIVE CONDITIONS.
CONDITIONS CALMED SLIGHTLY BETWEEN 0000-0700Z WITH ACTIVITY ON THE
BORDERLINE BETWEEN QUIET AND UNSETTLED. SINCE 0700Z, HOWEVER, THE
FIELD HAS BEEN VERY QUIET AT ALL LATITUDES. AN EXAMINATION OF THE
INTERPLANETARY MAGNETIC FIELD COMPONENT BZ SHOWED A NORTHWARD
TURNING OF THE FIELD TO ABOUT +5 NT AT 0500Z.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TOMORROW IN RESPONSE TO EFFECTS FROM A
FAVORABLY POSITIONED CORONAL HOLE. UNSETTLED CONDITIONS MAY LINGER
INTO THE EARLY PART OF THE SECOND DAY, BUT QUIET CONDITIONS SHOULD
PREVAIL FOR MOST OF THE SECOND AND THIRD DAYS.
III. Chans för solutbrott från 31 DEC till 02 JAN
| M-klass | 65% | 65% | 65% |
| X-klass | 15% | 15% | 15% |
| Proton | 15% | 20% | 20% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 30 DEC 179 Prognoserat 31 DEC-02 JAN 172/165/160 90 Day Mean 30 DEC 136
V. Geomagnetiskt A-index
OBSERVED AFR/AP 29 DEC 010/016 ESTIMATED AFR/AP 30 DEC 004/010 PREDICTED AFR/AP 31 DEC-02 JAN 010/010-007/010-005/007
VI. Chanser för geomagnetisk aktivitet från 31 DEC till 02 JAN
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 10% |
| Små stormförhållanden | 05% | 05% | 05% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 10% |
| Små stormförhållanden | 10% | 10% | 05% |
| Svåra stormförhållanden | 05% | 05% | 01% |
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