Viewing archive of torsdag, 8 april 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 Apr 08 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 098 publicerat klockan 2200Z på 08 APR 1999IA. Analys av solfläcksgrupper och solaktivitet från 07-2100Z till 08-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8508 (N22E13)
PRODUCED AN IMPULSIVE M1/SF AT 08/1613Z. THIS EVENT WAS PRECEDED BY
MANY PLAGE FLUCTUATIONS AND SEVERAL SMALL TO MID C-CLASS FLARES FROM
THIS REGION. DURING THE LAST 24 HOURS, REGION 8508 MAINTAINED ITS
MIXED POLARITIES AND GREW AT A MODERATE PACE. A SMALL REGION EMERGED
NEAR S27E53 AND WAS NUMBERED AS REGION 8512.
IB. Prognos för solaktivitet
SOLAR ACTIVITY SHOULD BE LOW TO
MODERATE FOR THE NEXT THREE DAYS. REGION 8508 MAY BE ENTERING A
PHASE OF RE-GROWTH AND THE FREQUENCY OF M-CLASS EVENTS MAY INCREASE.
X-CLASS FLARES ARE NOT EXPECTED AT THIS TIME BUT CONTINUED GROWTH IN
REGION 8508 WOULD CHANGE THAT FORECAST.
IIA. Sammanfattning av geofysisk aktivitet 07-2100Z till 08-2100Z
THE GEOMAGNETIC FIELD BEGAN THE PERIOD AT QUIET LEVELS. ACTIVE
CONDITIONS WERE OBSERVED DURING THE 08/1500-1800Z PERIOD. UNSETTLED
CONDITIONS OCCURRED AT THE END OF THE PERIOD. NO SHOCK WAS OBSERVED
IN THE NEARLY CONTINUOUS SOLAR WIND RECORD AND VELOCITY WAS
RELATIVELY LOW BETWEEN 350-400 KM/S. ENERGETIC ELECTRON FLUXES AT
GEOSYNCHRONOUS ORBIT REACHED HIGH LEVELS DURING THE PERIOD.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD SHOULD BE
PREDOMINANTLY QUIET TO UNSETTLED FOR THE NEXT THREE DAYS. ISOLATED
ACTIVE INTERVALS ARE POSSIBLE ON 09 APR.
III. Chans för solutbrott från 09 APR till 11 APR
| M-klass | 50% | 50% | 50% |
| X-klass | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 08 APR 139 Prognoserat 09 APR-11 APR 140/139/135 90 Day Mean 08 APR 134
V. Geomagnetiskt A-index
OBSERVED AFR/AP 07 APR 010/009 ESTIMATED AFR/AP 08 APR 010/012 PREDICTED AFR/AP 09 APR-11 APR 010/010-010/010-008/008
VI. Chanser för geomagnetisk aktivitet från 09 APR till 11 APR
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 25% | 15% | 15% |
| Små stormförhållanden | 15% | 05% | 05% |
| Svåra stormförhållanden | 05% | 01% | 05% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 25% | 15% | 15% |
| Små stormförhållanden | 15% | 05% | 05% |
| Svåra stormförhållanden | 05% | 01% | 05% |
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