Viewing archive of Thursday, 8 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 08 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 189 Issued at 2200Z on 08 JUL 1999

IA. Analysis of Solar Active Regions and Activity from 07-2100Z to 08-2100Z

SOLAR ACTIVITY WAS LOW. C-CLASS ACTIVITY CONTINUES BUT LESS FREQUENTLY THAN THE PAST FEW DAYS. THE LARGEST FLARE WAS AN OPTICALLY UNCORRELATED C5 AT 08/0708UT. REGION 8611 (S26W84) APPEARS TO BE LEAVING THE VISIBLE DISK QUIETLY. GROWTH IN REGION 8626 (S21W30) HAS SLOWED. NEW REGION 8627 (S12E70) WAS NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW. AN ISOLATED M-CLASS FLARE IS POSSIBLE IN DEPARTING REGION 8611 OR REGION 8626.
IIA. Geophysical Activity Summary 07-2100Z to 08-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED.
III. Event Probabilities 09 JUL to 11 JUL
Class M30%30%30%
Class X01%01%01%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       08 JUL 149
  Predicted   09 JUL-11 JUL  140/140/135
  90 Day Mean        08 JUL 150
V. Geomagnetic A Indices
OBSERVED AFR/AP 07 JUL  003/005
ESTIMATED AFR/AP 08 JUL  008/007
PREDICTED AFR/AP 09 JUL-11 JUL  010/007-015/007-010/007
VI. Geomagnetic Activity Probabilities 09 JUL to 11 JUL
A. Middle Latitudes
Active15%30%30%
Minor storm05%05%05%
Major-severe storm05%02%05%
B. High Latitudes
Active30%30%30%
Minor storm05%05%05%
Major-severe storm05%05%05%

All times in UTC

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