Viewing archive of Tuesday, 2 May 2000
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 2000 May 02 2200 UTCPrepared by the NOAA © SWPC and processed by SpaceWeatherLive.com
Joint USAF/NOAA Report of Solar and Geophysical Activity
SDF Number 123 Issued at 2200Z on 02 MAY 2000IA. Analysis of Solar Active Regions and Activity from 01-2100Z to 02-2100Z SOLAR ACTIVITY WAS MODERATE. REGION 8971 (N19W74)
PRODUCED AN M2/1N X-RAY EVENT AT 02/1451Z WITH AN ASSOCIATED 250 SFU
TENFLARE. OTHERWISE, ONLY SEVERAL MINOR C-CLASS EVENTS OCCURRED
DURING THE PERIOD. NO NEW REGIONS WERE NUMBERED.
IB. Solar Activity Forecast
SOLAR ACTIVITY IS EXPECTED TO BE
PREDOMINATELY LOW WITH THE CHANCE OF ISOLATED M-CLASS ACTIVITY FROM
REGION 8970 (S13W78) OR 8971.
IIA. Geophysical Activity Summary 01-2100Z to 02-2100Z
THE GEOMAGNETIC FIELD WAS QUIET TO ACTIVE. A SIGNIFICANT INCREASE IN
THE SOLAR WIND WAS OBSERVED WHEN A TRANSIENT PASSED THE ACE
SPACECRAFT AT APRROXIMATELY 02/1040Z. THE SOLAR WIND VELOCITY
INCREASED FROM AROUND 600 TO MOMENTARILY OVER 900 KM/SEC. ACTIVE
CONDITIONS OCCURRED SHORTLY AFTERWARDS. THE SOLAR WIND SPEED SLOWLY
SUBSIDED AND LEVELED OFF AROUND 600 KM/SEC DURING THE END OF THE
PERIOD.
IIB. Geophysical Activity Forecast
THE GEOMAGNETIC FIELD IS
EXPECTED TO BE PREDOMINATELY UNSETTLED TO ACTIVE WITH MINOR STORM
CONDITIONS POSSIBLE AT THE HIGH LATITUDES DURING THE FIRST HALF OF
THE PERIOD; THEN BECOMING MORE QUIET TO UNSETTLED DURING THE LAST
HALF OF THE PERIOD.
III. Event Probabilities 03 MAY to 05 MAY
| Class M | 35% | 30% | 25% |
| Class X | 01% | 01% | 01% |
| Proton | 01% | 01% | 01% |
| PCAF | GREEN | ||
IV. Penticton 10.7 cm Flux
Observed 02 MAY 153 Predicted 03 MAY-05 MAY 150/145/145 90 Day Mean 02 MAY 189
V. Geomagnetic A Indices
OBSERVED AFR/AP 01 MAY 012/014 ESTIMATED AFR/AP 02 MAY 014/015 PREDICTED AFR/AP 03 MAY-05 MAY 015/020-012/012-010/010
VI. Geomagnetic Activity Probabilities 03 MAY to 05 MAY
| A. Middle Latitudes | |||
|---|---|---|---|
| Active | 40% | 30% | 25% |
| Minor storm | 25% | 10% | 05% |
| Major-severe storm | 05% | 01% | 01% |
| B. High Latitudes | |||
|---|---|---|---|
| Active | 60% | 40% | 35% |
| Minor storm | 30% | 15% | 10% |
| Major-severe storm | 10% | 05% | 01% |
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