Viewing archive of söndag, 17 september 2000
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 2000 Sep 17 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 261 publicerat klockan 2200Z på 17 SEP 2000IA. Analys av solfläcksgrupper och solaktivitet från 16-2100Z till 17-2100Z SOLAR ACTIVITY WAS LOW. THE LARGEST FLARE OF THE PAST
DAY WAS A C5/1F AT 17/0643 UTC IN REGION 9167 (N11E69). THIS REGION
ALSO PRODUCED A NUMBER OF OTHER LESS SIGNIFICANT SUBFLARES. 9167 IS
STILL CLOSE TO THE EAST LIMB BUT APPEARS TO BE A GROWING D-TYPE
GROUP. REGION 9165 (N14W26) CONTINUES TO DECAY IN SUNSPOT AREA AND
MAGNETIC COMPLEXITY. HOWEVER, IT MANAGED TO PRODUCE SEVERAL C-CLASS
SUBFLARES, THE LARGEST OF WHICH WAS A C3/SF AT 17/0042 UTC. REGION
9166 (S14E37) ALSO PRODUCE A FEW C-CLASS FLARES AND CONTINUES TO
INCREASE IN COMPLEXITY AS IT ROTATES FURTHER ONTO THE DISK. NEW
REGION 9168 (N09E06) EMERGED.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. ADDITIONAL C-CLASS ACTIVITY IS EXPECTED IN REGIONS
9165, 9166, AND 9167. M-CLASS FLARES ARE POSSIBLE IN THESE REGIONS
AS WELL.
IIA. GEOPHYSICAL ACTIVITY SUMMARY 16/2100Z TO 17/2100Z:
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO STORM LEVELS. THE FIELD
APPEARED TO BE UNDER THE INFLUENCE OF A HIGH-SPEED CORONAL HOLE
STREAM FOR MOST OF THE DAY. ACE NEAR-REAL-TIME DATA SUGGESTS THE
ARRIVAL OF CME MATERIAL AT L1 AT ABOUT 17/1500 UTC. THIS CME MAY
HAVE BEEN ASSOCIATED WITH ACTIVITY IN REGION 9165 ON SEP 15.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TO ACTIVE, REACHING STORM LEVELS BY SEP 19.
THE STRONGEST ACTIVITY IS EXPECTED FROM A CME RELATED TO THE M5/2B
FLARE IN REGION 9165 EARLY ON SEP 16. A HIGH-SPEED CORONAL HOLE
STREAM MAY MAINTAIN ACTIVITY LEVELS FOR A FEW DAYS AFTER THESE CMES
PASS THE EARTH.
III. Chans för solutbrott från 18 SEP till 20 SEP
| M-klass | 50% | 50% | 50% |
| X-klass | 05% | 05% | 05% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 17 SEP 182 Prognoserat 18 SEP-20 SEP 185/190/190 90 Day Mean 17 SEP 177
V. Geomagnetiskt A-index
OBSERVED AFR/AP 16 SEP 014/021 ESTIMATED AFR/AP 17 SEP 020/025 PREDICTED AFR/AP 18 SEP-20 SEP 020/020-040/040-030/040
VI. Chanser för geomagnetisk aktivitet från 18 SEP till 20 SEP
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 60% | 50% | 50% |
| Små stormförhållanden | 15% | 25% | 25% |
| Svåra stormförhållanden | 05% | 25% | 25% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 75% | 25% | 25% |
| Små stormförhållanden | 15% | 30% | 30% |
| Svåra stormförhållanden | 05% | 35% | 35% |
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