Viewing archive of Saturday, 3 July 1999

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 1999 Jul 03 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 184 Issued at 2200Z on 03 JUL 1999

IA. Analysis of Solar Active Regions and Activity from 02-2100Z to 03-2100Z

SOLAR ACTIVITY WAS LOW. SEVERAL C-CLASS SUBFLARES OCCURRED DURING THE PERIOD FROM A VARIETY OF REGIONS. THE LARGEST WAS FROM REGION 8611 (S25W20) WHICH PRODUCED A C7/SF AT 03/2050Z. THREE NEW REGIONS WERE NUMBERED TODAY AS REGION 8618 (S17E58), 8619 (S17E71) AND 8620 (N22E56).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW TO MODERATE WITH ISOLATED M-CLASS FLARES POSSIBLE.
IIA. Geophysical Activity Summary 02-2100Z to 03-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO MINOR STORM LEVELS.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED FOR THE FORECAST PERIOD.
III. Event Probabilities 04 JUL to 06 JUL
Class M60%60%60%
Class X10%10%10%
Proton05%05%05%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       03 JUL 197
  Predicted   04 JUL-06 JUL  185/180/180
  90 Day Mean        03 JUL 149
V. Geomagnetic A Indices
OBSERVED AFR/AP 02 JUL  023/026
ESTIMATED AFR/AP 03 JUL  012/015
PREDICTED AFR/AP 04 JUL-06 JUL  008/012-008/012-008/015
VI. Geomagnetic Activity Probabilities 04 JUL to 06 JUL
A. Middle Latitudes
Active15%15%15%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active20%20%25%
Minor storm10%10%10%
Major-severe storm01%01%01%

All times in UTC

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