Viewing archive of lördag, 25 april 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 Apr 25 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 115 publicerat klockan 2200Z på 25 APR 1998IA. Analys av solfläcksgrupper och solaktivitet från 24-2100Z till 25-2100Z SOLAR ACTIVITY WAS LOW. REGION 8210 (S16E67) PRODUCED
TWO C-CLASS FLARES, A C3/SF LONG DURATION EVENT AT 25/1439Z AND A
C1/1F AT 25/1806Z WITH AN ASSOCIATED HIGH SPEED SURGE. BOTH FLARES
WERE ACCOMPANIED BY MINOR DISCRETE RADIO ACTIVITY. THIS REGION HAS
GROWN TO A DAO SPOT GROUP, BUT APPEARS TO BE MAGNETICALLY SIMPLE
THUS FAR. A THIRD C-CLASS EVENT, AN UNCORRELATED C1 X-RAY BURST, WAS
DETECTED AT 25/1123Z. NEW REGION 8211 (S22W12), A SIMPLE AXX SPOT,
WAS NUMBERED TODAY. THIS REGION RESIDES IN AN EXTENSIVE PLAGE FIELD
THAT APPEARS RIPE FOR DEVELOPMENT.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. REGION 8210 HAS A GOOD CHANCE OF PRODUCING FURTHER
C-CLASS ACTIVITY, A FAIR CHANCE OF M-CLASS ACTIVITY, AND A CHANCE OF
ISOLATED X-CLASS ACTIVITY OVER THE ENTIRE FORECAST PERIOD.
IIA. Sammanfattning av geofysisk aktivitet 24-2100Z till 25-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE FOR MOST OF THE PERIOD WITH
A SHORT PERIOD OF MINOR STORMING AT THE BEGINNING OF THE UT DAY. THE
GREATER THAN 2 MEV ENERGETIC ELECTRON FLUX REACHED HIGH LEVELS AT
25/1650Z.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET TO UNSETTLED FOR THE ENTIRE FORECAST PERIOD.
III. Chans för solutbrott från 26 APR till 28 APR
| M-klass | 15% | 20% | 20% |
| X-klass | 10% | 10% | 10% |
| Proton | 05% | 05% | 05% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 25 APR 092 Prognoserat 26 APR-28 APR 094/096/096 90 Day Mean 25 APR 104
V. Geomagnetiskt A-index
OBSERVED AFR/AP 24 APR 023/035 ESTIMATED AFR/AP 25 APR 018/015 PREDICTED AFR/AP 26 APR-28 APR 015/012-010/010-005/008
VI. Chanser för geomagnetisk aktivitet från 26 APR till 28 APR
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 25% | 15% | 10% |
| Små stormförhållanden | 10% | 05% | 05% |
| Svåra stormförhållanden | 05% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 25% | 20% | 15% |
| Små stormförhållanden | 10% | 10% | 10% |
| Svåra stormförhållanden | 05% | 05% | 05% |
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