Viewing archive of Tuesday, 25 November 1997

Solar activity report

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.
Report of Solar-Geophysical Activity 1997 Nov 25 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 329 Issued at 2200Z on 25 NOV 1997

IA. Analysis of Solar Active Regions and Activity from 24-2100Z to 25-2100Z

SOLAR ACTIVITY WAS LOW. SEVERAL C-CLASS FLARES OCCURRED SINCE YESTERDAY, MOST OF WHICH WERE OPTICALLY UNCORRELATED. THE LARGEST FLARE OF THE PAST DAY WAS A C9 AT 25/1952Z. THIS FLARE WAS ASSOCIATED WITH A 140 SFU RADIO BURST AT 2695 MHZ AND A BSL (BRIGHT SURGE AT THE LIMB) NEAR N25E90. THIS AREA IS ALSO PRESUMED TO BE THE SOURCE OF THE UNCORRELATED X-RAY FLARES. NO SPOTS ARE YET VISIBLE BUT SOMETHING SHOULD COME INTO VIEW BY TOMORROW. REGION 8108 (N19W79) HAS DECAYED FURTHER AND IS APPROACHING THE WEST LIMB QUIETLY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE. C-CLASS ACTIVITY IS EXPECTED TO CONTINUE FROM THE SUNSPOT GROUP ROUNDING THE NORTHEAST LIMB NEAR NE25. AN ISOLATED M-CLASS FLARE IS POSSIBLE FROM THIS AREA AS WELL.
IIA. Geophysical Activity Summary 24-2100Z to 25-2100Z
THE GEOMAGNETIC FIELD WAS QUIET AT ALL LATITUDES.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET.
III. Event Probabilities 26 NOV to 28 NOV
Class M30%30%30%
Class X02%02%02%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       25 NOV 102
  Predicted   26 NOV-28 NOV  100/102/105
  90 Day Mean        25 NOV 093
V. Geomagnetic A Indices
OBSERVED AFR/AP 24 NOV  006/007
ESTIMATED AFR/AP 25 NOV  003/005
PREDICTED AFR/AP 26 NOV-28 NOV  005/005-005/005-005/005
VI. Geomagnetic Activity Probabilities 26 NOV to 28 NOV
A. Middle Latitudes
Active10%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active10%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%

All times in UTC

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