Viewing archive of onsdag, 27 maj 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 May 27 2200 UTC
Skapad av NOAA © SWPC och bearbetad av SpaceWeatherLive.com

USAF/NOAA rapport för sol- och geofysisk aktivitet

:::::::::: CORRECTED COPY :::::::::: SDF Nummer 147 publicerat klockan 2200Z på 27 MAY 1998

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

SOLAR ACTIVITY WAS LOW. REGIONS 8224 (S24W90) AND 8226 (N18W66) PRODUCED SEVERAL C-CLASS FLARES INCLUDING A C7 LONG DURATION EVENT AT 27/1335Z WITH MODERATE RADIO BURSTS. BOTH REGIONS HAD A FLARE IN PROGRESS DURING THE X-RAY EVENT. LASCO IMAGERY SHOWS A LARGE CORONAL MASS EJECTION ORIGINATING FROM THE NW. WELL DEFINED POST FLARE LOOPS ARE OBVIOUS ON THE EIT IMAGES SUGGESTING THAT REGION 8226 WAS THE PROBABLE SOURCE FOR THE LONG DURATION EVENT. A MODERATE 8 FREQUENCY RADIO BURST AND TENFLARE ALSO OCCURRED WITH THIS EVENT. REGION 8224 WAS SPOTLESS FOR MOST OF ITS TRANSIT ON THE VISIBLE DISK BEFORE DEVELOPING RAPIDLY EARLY YESTERDAY. SPOTS ARE NOW VISIBLE IN THIS REGION AS IT ROUNDS THE WEST LIMB. REMAINING REGIONS HAVE BEEN QUIET.
IB. Prognos för solaktivitet
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. DRAMATIC GROWTH IN REGION 8224 WILL LIKELY ENSURE CONTINUED C-CLASS ACTIVITY AND A DEVELOPING CHANCE FOR M-CLASS. REGION 8226 WILL ALSO CONTINUE PRODUCING C-CLASS WITH A CHANCE OF A M-CLASS FLARE.
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 IS EXPECTED TO REMAIN MOSTLY QUIET TO UNSETTLED. WE ARE EXPECTING MINOR GEOEFFECTIVNESS ON DAY 3 FROM TODAY'S LONG DURATION EVENT.
III. Chans för solutbrott från 28 MAY till 30 MAY
M-klass15%10%05%
X-klass01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observerad       27 MAY 094
  Prognoserat   28 MAY-30 MAY  094/094/096
  90 Day Mean        27 MAY 108
V. Geomagnetiskt A-index
OBSERVED AFR/AP 26 MAY  007/008
ESTIMATED AFR/AP 27 MAY  008/010
PREDICTED AFR/AP 28 MAY-30 MAY  007/008-007/008-010/010
VI. Chanser för geomagnetisk aktivitet från 28 MAY till 30 MAY
A. Medelhöga breddgrader
Aktivt10%10%20%
Små stormförhållanden01%01%05%
Svåra stormförhållanden01%01%01%
B. Höga breddgrader
Aktivt15%15%25%
Små stormförhållanden05%05%10%
Svåra stormförhållanden01%01%01%

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