Viewing archive of Tuesday, 28 July 1998

Solar activity report

Report of Solar-Geophysical Activity 1998 Jul 28 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 209 Issued at 2200Z on 28 JUL 1998

IA. Analysis of Solar Active Regions and Activity from 27-2100Z to 28-2100Z

SOLAR ACTIVITY WAS VERY LOW. ONLY A FEW SMALL FLARES OCCURRED. THE LARGEST WAS A B9/SF AT 28/0823Z IN REGION 8280 (S23W11). THE LARGEST, AND POSSIBLY MOST COMPLEX, SUNSPOT GROUP ON THE VISIBLE DISK IS REGION 8282 (N31W09). THIS AREA HAS NOT PRODUCED SIGNIFICANT ACTIVITY IN THE PAST DAY.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE VERY LOW TO LOW. THERE IS ALSO A CHANCE OF AN M-CLASS LEVEL FLARE. MOST ACTIVITY IS EXPECTED TO OCCUR IN REGIONS 8280 AND 8282. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 27/2100Z TO 28/2100Z: THE GEOMAGNETIC FIELD WAS QUIET. THE GREATER THAN 2 MEV ELECTRON FLUX WAS HIGH.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 29 JUL to 31 JUL
Class M 15%15%15%
Class X 01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       28 JUL 121
  Predicted    29 JUL-31 JUL  120/120/120
  90 Day Mean        28 JUL 109
V. Geomagnetic A Indices
OBSERVED AFR/AP 27 JUL  005/006
ESTIMATED AFR/AP 28 JUL  006/008
PREDICTED AFR/AP 29 JUL-31 JUL  010/010-010/012-010/018
VI. Geomagnetic Activity Probabilities 29 JUL to 31 JUL
A. Middle Latitudes
Active15%15%15%
Minor storm 05%05%05%
Major-severe storm 01%01%05%
B. High Latitudes
Active15%15%15%
Minor storm 05%05%05%
Major-severe storm 01%01%05%

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