Viewing archive of måndag, 18 oktober 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 Oct 18 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 291 publicerat klockan 2200Z på 18 OCT 1999IA. Analys av solfläcksgrupper och solaktivitet från 17-2100Z till 18-2100Z SOLAR ACTIVITY CONTINUED AT LOW LEVELS. REGION 8731
(N13W33) SHOWED A SMALL INCREASE IN SPOT COUNT AND REMAINED A LARGE,
MAGNETICALLY COMPLEX REGION. IT PRODUCED ISOLATED C-CLASS SUBFLARES
DURING THE PERIOD. NO SIGNIFICANT CHANGES WERE OBSERVED IN THE
REMAINING REGIONS AND NO NEW REGIONS WERE ASSIGNED.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE AT
LOW TO MODERATE LEVELS. REGION 8731, THOUGH RELATIVELY INACTIVE
DURING THE PAST FEW DAYS, STILL APPEARS CAPABLE OF M-CLASS FLARE
PRODUCTION. THERE IS A SLIGHT CHANCE FOR A MAJOR FLARE FROM THIS
REGION AS WELL.
IIA. Sammanfattning av geofysisk aktivitet 17-2100Z till 18-2100Z
GEOMAGNETIC FIELD ACTIVITY WAS AT QUIET TO UNSETTLED LEVELS. THE
GREATER THAN 2 MEV ELECTRON FLUX REMAINED AT MODERATE TO HIGH
LEVELS.
IIB. Prognos för geofysisk aktivitet
GEOMAGNETIC FIELD ACTIVITY IS
EXPECTED TO REMAIN AT QUIET TO UNSETTLED LEVELS DURING THE FIRST TWO
DAYS OF THE PERIOD. ACTIVITY IS EXPECTED TO INCREASE TO UNSETTLED TO
ACTIVE LEVELS ON THE FINAL DAY DUE TO CORONAL HOLE EFFECTS. THE
GREATER THAN 2 MEV ELECTRON FLUX IS EXPECTED TO REMAIN AT MODERATE
TO HIGH LEVELS.
III. Chans för solutbrott från 19 OCT till 21 OCT
| M-klass | 50% | 50% | 50% |
| X-klass | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 18 OCT 173 Prognoserat 19 OCT-21 OCT 170/170/165 90 Day Mean 18 OCT 158
V. Geomagnetiskt A-index
OBSERVED AFR/AP 17 OCT 016/026 ESTIMATED AFR/AP 18 OCT 008/012 PREDICTED AFR/AP 19 OCT-21 OCT 008/010-010/008-015/015
VI. Chanser för geomagnetisk aktivitet från 19 OCT till 21 OCT
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 10% | 20% | 30% |
| Små stormförhållanden | 05% | 10% | 15% |
| Svåra stormförhållanden | 01% | 01% | 05% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 25% | 40% |
| Små stormförhållanden | 05% | 15% | 20% |
| Svåra stormförhållanden | 01% | 01% | 10% |
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