Viewing archive of torsdag, 30 december 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 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 1999IA. Analys av solfläcksgrupper och solaktivitet från 29-2100Z till 30-2100Z SOLAR ACTIVITY WAS LOW. ISOLATED MINOR C-CLASS EVENTS
OCCURRED EARLY IN THE PERIOD. COMPLEX REGION 8806 (N22W96) PRODUCED
A C2/SF WITH A LARGE BRIGHT SURGE AT 29/2151Z. THIS REGION HAS SINCE
ROTATED FROM VIEW WITH JUST MINOR SURGING EVIDENT ON THE LIMB.
REMAINING REGIONS WERE STABLE.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
OLD REGION 8806 MAY STILL PRODUCE ISOLATED C-LEVEL X-RAY EVENTS AS
IT ROTATES FURTHER AROUND THE WEST LIMB. REGION 8810 (N37E06),
THOUGH STABLE, HAS POTENTIAL FOR ISOLATED C-CLASS EVENTS.
IIA. Sammanfattning av geofysisk aktivitet 29-2100Z till 30-2100Z
THE GEOMAGNETIC FIELD WAS QUIET WITH UNSETTLED CONDITIONS BEGINNING
LATE IN THE PERIOD. THE ONSET OF A HIGH SPEED CORONAL HOLE STREAM
WAS OBSERVED AROUND 30/1530Z, AND ACCOUNTED FOR THE LATE-DAY
DISTURBANCE.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE AT QUIET TO ACTIVE LEVELS WITH MINOR STORMING PERIODS
LIKELY AT HIGH LATITUDES. THIS CORONAL HOLE RELATED DISTURBANCE WILL
LIKELY PERSIST THROUGH THE NEXT THREE DAYS.
III. Chans för solutbrott från 31 DEC till 02 JAN
| M-klass | 20% | 10% | 10% |
| X-klass | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 30 DEC 136 Prognoserat 31 DEC-02 JAN 130/130/130 90 Day Mean 30 DEC 176
V. Geomagnetiskt A-index
OBSERVED AFR/AP 29 DEC 005/007 ESTIMATED AFR/AP 30 DEC 005/006 PREDICTED AFR/AP 31 DEC-02 JAN 015/015-020/025-020/025
VI. Chanser för geomagnetisk aktivitet från 31 DEC till 02 JAN
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 60% | 65% | 65% |
| Små stormförhållanden | 20% | 25% | 25% |
| Svåra stormförhållanden | 05% | 10% | 10% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 60% | 60% | 60% |
| Små stormförhållanden | 30% | 30% | 30% |
| Svåra stormförhållanden | 10% | 10% | 10% |
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