Viewing archive of fredag, 27 november 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 Nov 27 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

SDF Nummer 331 publicerat klockan 2200Z på 27 NOV 1998

IA. Analys av solfläcksgrupper och solaktivitet från 26-2100Z till 27-2100Z

SOLAR ACTIVITY BECAME MODERATE. REGION 8392 (S23W05) PRODUCED A M1/2N AT 27/0743Z. THIS EVENT HAD MODERATE CENTIMETRIC BURSTS INCLUDING 390 SFU'S AT 2695 MHZ. A TYPE II SWEEP WITH 700 KM/S SHOCK SPEED WAS ALSO OBSERVED WITH THIS EVENT. THE NORTHERN HALF OF A 15 DEGREE LONG FILAMENT SHOWED STRONG LINEAR CHANGE SHORTLY BEFORE THE FLARE BEGAN AND ERUPTED AS THE FLARE OCCURRED. REGIONS 8395 (N19E44) EXHIBITED LITTLE CHANGE IN THE PAST 24 HOURS AND CONTINUES TO PRODUCE OCCASIONAL MINOR C-CLASS SUBFLARES. REGION 8393 (S19E24) MAINTAINS A BETA-GAMMA CONFIGURATION IN A MODERATE-SIZED F-TYPE SPOT GROUP. IT DEVELOPED FURTHER MAGNETIC COMPLEXITY ALONG THE EASTERN PORTION OF THE REGION AND THE SOUTHERN EDGE OF THE LEADER SPOTS WHERE FREQUENT FLUCTUATIONS AND SURGES WERE NOTED. REMAINDER OF THE DISK AND LIMB WAS QUIET.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO REMAIN LOW TO MODERATE. REGION 8395 WILL CONTINUE TO BE THE PRIMARY FLARE PRODUCER WITH THE BEST CHANCE OF ISOLATED LOW M-CLASS ACTIVITY. REGION 8393'S RECENT GROWTH BEARS WATCHING - MOSTLY C-CLASS FLARES EXPECTED WITH A SMALL CHANCE FOR A LOW M-CLASS. REGION 8392 WAS IN DECAY WHEN THE M1/2N FLARE OCCURRED. THE REGION CONTINUES TO DECAY SLOWLY - FURTHER M-CLASS ACTIVITY IS UNLIKELY.
IIA. Sammanfattning av geofysisk aktivitet 26-2100Z till 27-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED
IIB. Prognos för geofysisk aktivitet
THE GEOMAGNETIC FIELD SHOULD REMAIN QUIET TO UNSETTLED FOR DAY 1 AND 2. ACTIVE CONDITIONS MAY DEVELOP ON DAY 3 IN RESPONSE TO THE M1/2N FLARE OBSERVED TODAY.
III. Chans för solutbrott från 28 NOV till 30 NOV
M-klass40%40%40%
X-klass05%05%05%
Proton05%05%05%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observerad       27 NOV 159
  Prognoserat   28 NOV-30 NOV  160/160/160
  90 Day Mean        27 NOV 132
V. Geomagnetiskt A-index
OBSERVED AFR/AP 26 NOV  010/011
ESTIMATED AFR/AP 27 NOV  010/009
PREDICTED AFR/AP 28 NOV-30 NOV  010/010-010/012-015/025
VI. Chanser för geomagnetisk aktivitet från 28 NOV till 30 NOV
A. Medelhöga breddgrader
Aktivt20%20%30%
Små stormförhållanden01%01%05%
Svåra stormförhållanden01%01%01%
B. Höga breddgrader
Aktivt20%20%35%
Små stormförhållanden01%01%10%
Svåra stormförhållanden01%01%01%

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