Viewing archive of torsdag, 17 december 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 Dec 17 2200 UTCSkapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com
USAF/NOAA rapport för sol- och geofysisk aktivitet
SDF Nummer 351 publicerat klockan 2200Z på 17 DEC 1998IA. Analys av solfläcksgrupper och solaktivitet från 16-2100Z till 17-2100Z SOLAR ACTIVITY WAS MODERATE WITH SEVERAL C-CLASS X-RAY
EVENTS AND ONE ISOLATED M-CLASS X-RAY FLARE DURING THE PERIOD.
REGION 8409 (S28W52) PRODUCED A M3/1N EVENT AT 17/0745Z WITH AN
ASSOCIATED TYPE II SWEEP. THE TYPE II SPEED WAS ESTIMATED AT 500
KM/S. A 230 SFU TENFLARE WAS ALSO DETECTED DURING THE M3 EVENT. AT
17/1418Z, REGION 8409 PRODUCED A C7/SN EVENT. AN ASSOCIATED TYPE II
SWEEP WITH AN ESTIMATED SPEED OF 600 KM/S WAS OBSERVED. REGION 8415
(N19E70) WAS NUMBERED AND IS CURRENTLY A BXO BETA SPOT GROUP WITH
SEVEN SPOTS. AT 17/1753Z, REGION 8415 PRODUCED A C6/1F EVENT.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW
WITH CONTINUED C-CLASS EVENTS. THERE IS A CHANCE FOR AN ISOLATED
M-CLASS X-RAY EVENT OUT OF REGION 8409.
IIA. Sammanfattning av geofysisk aktivitet 16-2100Z till 17-2100Z
THE GEOMAGNETIC FIELD WAS QUIET. NO FURTHER AFFECTS WERE OBSERVED
FROM THE CORONAL HOLE IN THE NORTHERN HEMISPHERE DURING THE PERIOD.
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE QUIET DURING THE FIRST DAY OF THE PERIOD BECOMING
QUIET TO UNSETTLED DURING THE LAST TWO DAYS OF THE PERIOD.
III. Chans för solutbrott från 18 DEC till 20 DEC
| M-klass | 25% | 25% | 25% |
| X-klass | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observerad 17 DEC 146 Prognoserat 18 DEC-20 DEC 145/140/135 90 Day Mean 17 DEC 133
V. Geomagnetiskt A-index
OBSERVED AFR/AP 16 DEC 009/011 ESTIMATED AFR/AP 17 DEC 001/002 PREDICTED AFR/AP 18 DEC-20 DEC 005/009-008/009-008/009
VI. Chanser för geomagnetisk aktivitet från 18 DEC till 20 DEC
| A. Medelhöga breddgrader | |||
|---|---|---|---|
| Aktivt | 10% | 10% | 10% |
| Små stormförhållanden | 01% | 01% | 01% |
| Svåra stormförhållanden | 01% | 01% | 01% |
| B. Höga breddgrader | |||
|---|---|---|---|
| Aktivt | 15% | 15% | 15% |
| Små stormförhållanden | 01% | 01% | 01% |
| Svåra stormförhållanden | 01% | 01% | 01% |
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