Viewing archive of lördag, 11 september 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 Sep 11 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 254 publicerat klockan 2200Z på 11 SEP 1999IA. Analys av solfläcksgrupper och solaktivitet från 10-2100Z till 11-2100Z SOLAR ACTIVITY INCREASED TO LOW LEVELS BY VIRTUE OF AN
OPTICALLY UNCORRELATED C1 X-RAY FLARE AT 11/0631Z. ISOLATED B-CLASS
X-RAY FLARES WERE ALSO DETECTED, ONE OF WHICH WAS ASSOCIATED WITH A
SUBFLARE IN REGION 8690 (N14E06). REGION 8690 DISPLAYED A SMALL
INCREASE IN SPOT COUNT DURING THE PERIOD, BUT WAS OTHERWISE
UNREMARKABLE. NEW REGIONS 8696 (N14W48), 8697 (S20W06), 8698
(S16E64), AND 8699 (N21E29) WERE ASSIGNED TODAY. REGION 8699
APPEARED TO BE GROWING AT A MODERATE PACE AND PRODUCED A SMALL
SUBFLARE LATE IN THE PERIOD.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO REMAIN
AT LOW LEVELS. REGIONS 8690, 8692, AND 8699 MAY PRODUCE C-CLASS
FLARES.
IIA. Sammanfattning av geofysisk aktivitet 10-2100Z till 11-2100Z
GEOMAGNETIC FIELD ACTIVITY RANGED FROM QUIET TO ACTIVE LEVELS.
UNSETTLED TO ACTIVE LEVELS OCCURRED DURING 11/0100 - 0500Z FOLLOWING
A SOUTHWARD TURNING OF THE BZ COMPONENT OF THE INTERPLANETARY
MAGNETIC FIELD. FIELD ACTIVITY DECLINED TO MOSTLY QUIET LEVELS AFTER
11/0500Z.
IIB. Prognos för geofysisk aktivitet
GEOMAGNETIC FIELD ACTIVITY IS
EXPECTED TO VARY FROM QUIET TO ACTIVE LEVELS. INTERMITTENT ACTIVE
PERIODS ARE EXPECTED IN RESPONSE TO RECURRENT CORONAL HOLE EFFECTS.
III. Chans för solutbrott från 12 SEP till 14 SEP
| M-klass | 25% | 25% | 25% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 11 SEP 123 Prognoserat 12 SEP-14 SEP 125/125/130 90 Day Mean 11 SEP 164
V. Geomagnetiskt A-index
OBSERVED AFR/AP 10 SEP 012/015 ESTIMATED AFR/AP 11 SEP 010/015 PREDICTED AFR/AP 12 SEP-14 SEP 015/015-015/015-015/015
VI. Chanser för geomagnetisk aktivitet från 12 SEP till 14 SEP
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 35% | 35% | 35% |
| Små stormförhållanden | 10% | 10% | 10% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 40% | 40% | 40% |
| Små stormförhållanden | 15% | 15% | 15% |
| Svåra stormförhållanden | 05% | 05% | 05% |
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