Viewing archive of Wednesday, 16 June 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 Jun 16 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 167 Issued at 2200Z on 16 JUN 1999

IA. Analysis of Solar Active Regions and Activity from 15-2100Z to 16-2100Z

SOLAR ACTIVITY WAS LOW. REGION 8585 (N37E28) PRODUCED A C3/1F AT 16/0509Z. THIS EVENT ALSO CORRESPONDED WITH A CME SEEN ON THE LASCO IMAGES. AN OPTICALLY UNCORRELATD TYPE II RADIO SWEEP (SPEED 700 KM/S) OCCURRED AT 16/0328Z. A NEW REGION WAS NUMBERED TODAY AS REGION 8589 (N28E04).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW WITH AN ISOLATED CHANCE FOR AN M-CLASS EVENT.
IIA. Geophysical Activity Summary 15-2100Z to 16-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO UNSETTLED.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE QUIET TO UNSETTLED THROUGH THE PERIOD.
III. Event Probabilities 17 JUN to 19 JUN
Class M20%20%20%
Class X05%05%05%
Proton01%01%01%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       16 JUN 153
  Predicted   17 JUN-19 JUN  150/150/145
  90 Day Mean        16 JUN 136
V. Geomagnetic A Indices
OBSERVED AFR/AP 15 JUN  004/008
ESTIMATED AFR/AP 16 JUN  005/008
PREDICTED AFR/AP 17 JUN-19 JUN  005/010-005/007-005/007
VI. Geomagnetic Activity Probabilities 17 JUN to 19 JUN
A. Middle Latitudes
Active20%20%20%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active25%25%25%
Minor storm05%05%05%
Major-severe storm01%01%01%

All times in UTC

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