Viewing archive of Tuesday, 8 June 1999

Solar activity report

Report of Solar-Geophysical Activity 1999 Jun 08 2200 UTC
Prepared by the NOAA © SWPC and processed by SpaceWeatherLive.com

Joint USAF/NOAA Report of Solar and Geophysical Activity

SDF Number 159 Issued at 2200Z on 08 JUN 1999

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

SOLAR ACTIVITY WAS LOW. AS HAS BEEN THE PATTERN OF THE PAST FEW DAYS, JUST OCCASIONAL SMALL C-CLASS EVENTS OCCURRED. REGION 8574 (N28E01) WAS THE MOST ACTIVE CENTER, AND REMAINS BRIGHT IN H-ALPHA. TWO NEW REGIONS WERE ASSIGNED; 8577 (N19W37) AND 8578 (N19E04).
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE LOW. IIA. GEOPHYSICAL ACTIVITY SUMMARY FROM 07/2100Z TO 08/2100Z: THE GEOMAGNETIC FIELD VARIED FROM QUIET TO ACTIVE. SOLAR WIND DATA SHOW PROLONGED PERIODS OF SOUTHWARD IMF, PERHAPS ASSOCIATED WITH THE PASSAGE OF A RECURRENT STRUCTURE ASSOCIATED WITH THE HELIOSPHERIC CURRENT SHEET.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS EXPECTED TO BE UNSETTLED DURING THE NEXT 24 HOURS, WITH A CHANCE OF ACTIVE CONDITIONS DURING LOCAL NIGHTTIMES. QUIET CONDITIONS SHOULD PREVAIL JUNE 10-11.
III. Event Probabilities 09 JUN to 11 JUN
Class M30%30%30%
Class X05%05%05%
Proton05%05%05%
PCAFGREEN
IV. Penticton 10.7 cm Flux
  Observed       08 JUN 157
  Predicted   09 JUN-11 JUN  155/150/145
  90 Day Mean        08 JUN 134
V. Geomagnetic A Indices
OBSERVED AFR/AP 07 JUN  004/004
ESTIMATED AFR/AP 08 JUN  015/012
PREDICTED AFR/AP 09 JUN-11 JUN  010/010-005/005-005/005
VI. Geomagnetic Activity Probabilities 09 JUN to 11 JUN
A. Middle Latitudes
Active30%10%10%
Minor storm05%05%05%
Major-severe storm01%01%01%
B. High Latitudes
Active40%15%15%
Minor storm05%05%05%
Major-severe storm01%01%01%

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