Viewing archive of onsdag, 21 oktober 1998
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 1998 Oct 21 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 294 publicerat klockan 2200Z på 21 OCT 1998IA. Analys av solfläcksgrupper och solaktivitet från 20-2100Z till 21-2100Z SOLAR ACTIVITY WAS LOW. THE LARGEST X-RAY FLARE OF THE
PAST DAY WAS A LONG DURATION C7 THAT, FROM EIT IMAGES, APPARENTLY
OCCURRED FROM BEHIND THE SOUTHWEST LIMB. THIS FLARE WAS ASSOCIATED
WITH A WEAK TYPE II/IV RADIO SWEEP AND CORONAL LOOPS. REGION 8365
(S28W24) HAS BEEN EMERGING RAPIDLY, MORE THAN DOUBLING ITS SUNSPOT
AREA. THIS REGION HAS STARTED TO GENERATE SMALL FLARES; THE LARGEST
SO FAR BEING A C1/SF AT 21/1132Z. NEW REGION 8367 (N16E00) EMERGED
JUST TO THE SOUTHEAST OF REGION 8362 (N18W08).
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW.
C-CLASS ACTIVITY IS POSSIBLE FROM REGION 8361 (N15W94), AS IT ROUNDS
THE WEST LIMB, AND REGION 8365.
IIA. Sammanfattning av geofysisk aktivitet 20-2100Z till 21-2100Z
THE GEOMAGNETIC FIELD WAS UNSETTLED TO ACTIVE. THIS ACTIVITY IS
BELIEVED TO BE THE RESULT OF ALFVENIC WAVE ACTIVITY ASSOCIATED WITH
A HIGH-SPEED STREAM FROM THE NORTHERN POLAR CORONAL HOLE. THE 2 MEV
ELECTRON FLUX WAS MODERATE TO HIGH.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TO ACTIVE FOR THE NEXT 24 HOURS, BECOMING
QUIET TO UNSETTLED.
III. Chans för solutbrott från 22 OCT till 24 OCT
| M-klass | 10% | 05% | 01% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 21 OCT 118 Prognoserat 22 OCT-24 OCT 115/115/115 90 Day Mean 21 OCT 132
V. Geomagnetiskt A-index
OBSERVED AFR/AP 20 OCT 011/017 ESTIMATED AFR/AP 21 OCT 022/020 PREDICTED AFR/AP 22 OCT-24 OCT 018/020-015/012-010/010
VI. Chanser för geomagnetisk aktivitet från 22 OCT till 24 OCT
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 15% |
| Små stormförhållanden | 10% | 10% | 05% |
| Svåra stormförhållanden | 05% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 15% |
| Små stormförhållanden | 10% | 10% | 05% |
| Svåra stormförhållanden | 05% | 01% | 01% |
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