Viewing archive of torsdag, 29 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 29 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 119 publicerat klockan 2200Z på 29 APR 1999IA. Analys av solfläcksgrupper och solaktivitet från 28-2100Z till 29-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8524 (N22W15)
PRODUCED AN M1/1B FLARE AT 29/1954UT. THIS REGION ALSO PRODUCED A
FEW C-CLASS SUBFLARES, THE LARGEST BEING A C3/SF AT 29/1741UT.
DEVELOPMENT IN THE 8524 AREA HAS MADE IDENTIFICATION OF THE SMALL
SUNSPOT GROUP JUST TO THE SOUTH, REGION 8522 (N17W14), DIFFICULT IF
NOT IMPOSSIBLE. THESE REGIONS WILL MOST LIKELY NEED TO BE COMBINED.
NEW REGION 8525 (N15E68) ROTATED AROUND THE EAST LIMB AND HAS
ALREADY PRODUCED C-CLASS ACTIVITY, A C2/SF AT 29/0829UT. THE AREA IS
STILL COMING INTO VIEW BUT DOES NOT YET APPEAR TO BE SIGNIFICANTLY
COMPLEX. NEW REGION 8526 (N22E35) WAS ALSO NUMBERED.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW
TO MODERATE. C-CLASS ACTIVITY IS EXPECTED IN REGIONS 8524 AND 8525.
AN ADDITIONAL M-CLASS FLARE IS POSSIBLE IN REGION 8524.
IIA. Sammanfattning av geofysisk aktivitet 28-2100Z till 29-2100Z
THE GEOMAGNETIC FIELD RANGED FROM QUIET TO ACTIVE.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE UNSETTLED TO ACTIVE. EFFECTS FROM A HIGH-SPEED STREAM
ASSOCIATED WITH A FAVORABLY POSITIONED CORONAL HOLE ARE EXPECTED TO
BEGIN WITHIN THE FORECAST PERIOD. ISOLATED MINOR STORM CONDITIONS
ARE POSSIBLE IF THIS OCCURS.
III. Chans för solutbrott från 30 APR till 02 MAY
| M-klass | 15% | 15% | 15% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 29 APR 122 Prognoserat 30 APR-02 MAY 125/130/135 90 Day Mean 29 APR 128
V. Geomagnetiskt A-index
OBSERVED AFR/AP 28 APR 014/019 ESTIMATED AFR/AP 29 APR 015/025 PREDICTED AFR/AP 30 APR-02 MAY 015/025-015/030-015/030
VI. Chanser för geomagnetisk aktivitet från 30 APR till 02 MAY
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 15% |
| Små stormförhållanden | 10% | 10% | 10% |
| Svåra stormförhållanden | 05% | 05% | 05% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 15% |
| Små stormförhållanden | 10% | 10% | 10% |
| Svåra stormförhållanden | 05% | 05% | 05% |
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