Viewing archive of Wednesday, 14 June 2000
Solar activity report
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Report of Solar-Geophysical Activity 2000 Jun 14 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 166 Issued at 2200Z on 14 JUN 2000IA. Analysis of Solar Active Regions and Activity from 13-2100Z to 14-2100Z SOLAR ACTIVITY REMAINED LOW. THE LARGEST EVENT OF THE
PERIOD WAS A C4/SN FLARE AT 14/0149Z FROM REGION 9042 (N20E58).
THIS REGION NOW APPEARS TO BE A MODERATELY LARGE SUNSPOT GROUP WITH
SOME MIXED MAGNETIC FIELDS IN THE TRAILER. REGION 9033 (N25W35)
GENERATED A C1/1F FLARE AT 14/1349Z WITH A SHORT-LIVED TYPE II.
THIS REGION SHOWED SLIGHT DECAY DURING THE PERIOD AND REMAINED
MAGNETICALLY COMPLEX. A MODERATE SIZE H CLASS SUNSPOT WITH
MODERATELY BRIGHT X-RAY EMISSION APPEARED AT N15E87 AND WAS NUMBERED
AS NEW REGION 9046. NEW REGION 9045 (S15E20) EMERGED NEAR THE NORTH
END OF A LARGE FILAMENT.
IB. Solar Activity Forecast
SOLAR ACTIVITY SHOULD BE LOW TO
MODERATE. SEVERAL REGIONS ON THE DISK ARE CAPABLE OF M-CLASS EVENTS.
THE OCCURRENCE OF AN ISOLATED MAJOR FLARE CANNOT BE RULED OUT. THE
FILAMENT NEAR NEW REGION 9045 MAY ERUPT IN THE NEXT SEVERAL DAYS.
IIA. Geophysical Activity Summary 13-2100Z to 14-2100Z
THE GEOMAGNETIC FIELD WAS PREDOMINANTLY UNSETTLED TO ACTIVE. SOLAR
WIND PARAMETERS WERE UNUSUAL IN THAT VELOCITY WAS NEAR NOMINAL BUT
TOTAL FIELD STRENGTH WAS APPROXIMATELY 15 NT AND DENSITY WAS HIGH AT
APPROXIMATELY 55 P/CC. THIS COULD BE THE TRAILING END OF THE MASS
EJECTION THAT IMPACTED THE EARTH LATE ON 12 JUN.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD SHOULD BE
QUIET TO ACTIVE FOR THE EARLY PART OF 15 JUN. QUIET TO UNSETTLED
LEVELS ARE EXPECTED FOR LATE ON 15 JUN THROUGH 17 JUN. THERE IS A
SLIGHT POSSIBILITY OF AN ENERGETIC PROTON EVENT DURING THE PERIOD.
III. Event Probabilities 15 JUN to 17 JUN
| Class M | 50% | 50% | 50% |
| Class X | 10% | 10% | 10% |
| Proton | 10% | 10% | 10% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 14 JUN 201 Predicted 15 JUN-17 JUN 195/192/190 90 Day Mean 14 JUN 188
V. Geomagnetic A Indices
OBSERVED AFR/AP 13 JUN 010/016 ESTIMATED AFR/AP 14 JUN 017/019 PREDICTED AFR/AP 15 JUN-17 JUN 012/012-010/010-008/008
VI. Geomagnetic Activity Probabilities 15 JUN to 17 JUN
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 30% | 15% | 10% |
| Minor storm | 20% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 35% | 20% | 10% |
| Minor storm | 20% | 05% | 05% |
| Major-severe storm | 05% | 01% | 01% |
All times in UTC
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