Viewing archive of Saturday, 10 October 1998

Solar activity report

Report of Solar-Geophysical Activity 1998 Oct 10 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 283 Issued at 2200Z on 10 OCT 1998

IA. Analysis of Solar Active Regions and Activity from 09-2100Z to 10-2100Z

SOLAR ACTIVITY WAS LOW. TODAY'S LARGEST FLARE WAS A C7 AT 1318Z. THE LOCATION ON THE DISK WAS NOT OBSERVED DUE TO WEATHER LIMITED OBSERVATIONS. REGION 8350 (N19W38) APPEARED TO BE STABLE DURING THE PERIOD, BUT THERE IS A SMALL INTRUSION OF LEADER POLARITY FLUX INTO THE TRAILER PORTION OF THE REGION. THIS PART OF THE GROUP WAS OBSERVED TO PRODUCE SOME POINT BRIGHTENING ACTIVITY. REGION 8355 (S22E23), THE LARGEST GROUP ON THE DISK (180 MILLIONTHS), WAS STABLE AND QUIET.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW. REGION 8350 SEEMS TO BE LIKELY TO PRODUCE AN OCCASIONAL C-CLASS FLARE OVER THE NEXT FEW DAYS. THE MAGNETIC FIELD STRUCTURE IN REGION 8355 APPEARS TO BE RELAXING SOMEWHAT: AN OCCASIONAL C-FLARE IS LIKELY FROM THIS GROUP AND THERE IS A SLIGHT CHANCE FOR AN ISOLATED M-CLASS EVENT. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 09/2100Z TO 10/2100Z: THE GEOMAGNETIC FIELD WAS MOSTLY QUIET. THERE WAS AN ISOLATED ACTIVE PERIOD FROM 0300-0600Z. THE GREATER THAN 2 MEV ELECTRON FLUXES ATTAINED HIGH LEVELS TODAY.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 11 OCT to 13 OCT
Class M10%10%10%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       10 OCT 121
  Predicted   11 OCT-13 OCT  125/125/130
  90 Day Mean        10 OCT 130
V. Geomagnetic A Indices
OBSERVED AFR/AP 09 OCT  010/016
ESTIMATED AFR/AP 10 OCT  010/010
PREDICTED AFR/AP 11 OCT-13 OCT  005/010-005/010-005/010
VI. Geomagnetic Activity Probabilities 11 OCT to 13 OCT
A. Middle Latitudes
Active10%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active15%15%15%
Minor storm05%05%05%
Major-severe storm01%01%01%

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