Viewing archive of tisdag, 23 november 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 Nov 23 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 327 publicerat klockan 2200Z på 23 NOV 1999IA. Analys av solfläcksgrupper och solaktivitet från 22-2100Z till 23-2100Z SOLAR ACTIVITY REMAINED AT LOW LEVELS. REGION 8771
(S14W26) PRODUCED NUMEROUS SUBFLARES DURING THE PERIOD INCLUDING A
FEW THAT REACHED C-CLASS. THIS REGION APPEARED TO STABILIZE AS A
LARGE E-TYPE SPOT GROUP WITH COMPACT SUNSPOT DISTRIBUTION AND A
MIXED-POLARITY MAGNETIC STRUCTURE. REGION 8765 (S12W85) REMAINED A
LARGE, MAGNETICALLY COMPLEX GROUP, BUT WAS STABLE AS IT BEGAN TO
CROSS THE WEST LIMB. THE REMAINING REGIONS WERE STABLE. NO NEW
REGIONS WERE ASSIGNED.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. ISOLATED M-CLASS FLARES ARE POSSIBLE FROM REGION 8771
AND REGION 8765 (AS IT ROTATES OUT OF VIEW). THERE IS ALSO A SLIGHT
CHANCE FOR A MAJOR FLARE FROM EITHER OF THESE REGIONS.
IIA. Sammanfattning av geofysisk aktivitet 22-2100Z till 23-2100Z
GEOMAGNETIC FIELD ACTIVITY RANGED FROM QUIET TO ACTIVE LEVELS. ACTIVE
LEVELS OCCURRED DURING 23/0500 - 0900Z FOLLOWING A PERIOD OF
PERSISTENT SOUTHWARD IMF BZ. ACTIVITY DECLINED TO UNSETTLED LEVELS
AFTER 23/0900Z.
IIB. Prognos för geofysisk aktivitet
GEOMAGNETIC FIELD ACTIVITY IS
EXPECTED TO BE AT MOSTLY QUIET TO UNSETTLED LEVELS THROUGH THE
PERIOD. THERE IS A SLIGHT CHANCE FOR A PROTON EVENT AT
GEOSYNCHRONOUS ORBIT, SHOULD A MAJOR FLARE OCCUR FROM REGIONS 8765
OR 8771.
III. Chans för solutbrott från 24 NOV till 26 NOV
| M-klass | 70% | 60% | 60% |
| X-klass | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | YELLOW | ||
IV. Penticton 10.7 cm Flux
Observerad 23 NOV 186 Prognoserat 24 NOV-26 NOV 175/170/155 90 Day Mean 23 NOV 167
V. Geomagnetiskt A-index
OBSERVED AFR/AP 22 NOV 008/010 ESTIMATED AFR/AP 23 NOV 014/014 PREDICTED AFR/AP 24 NOV-26 NOV 012/015-010/010-007/010
VI. Chanser för geomagnetisk aktivitet från 24 NOV till 26 NOV
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 25% | 20% | 15% |
| Små stormförhållanden | 10% | 05% | 05% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 30% | 25% | 20% |
| Små stormförhållanden | 15% | 10% | 10% |
| Svåra stormförhållanden | 01% | 01% | 01% |
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